Usbdk Driver
The Windows USB filter driver behind modern device redirection
Usbdk Driver is a useful resource for USB driver information, device compatibility, setup details, and troubleshooting solutions. Find practical resources for managing USB devices and improving connectivity across different systems. Our goal is to provide clear, helpful, and easy-to-understand information for users looking for reliable USB driver support.
Filter driver + user-mode API
Original driver kept
The device keeps its existing driver stack in place.
Exposed to user mode
Applications open the device through the UsbDk API.
Redirecting a USB device into a virtual machine or a remote session, and giving libusb-based tools a way to reach devices on Windows.
A calmer way to get to grips with usbdk driver
Easy to Understand
Plain-language explanations of what the driver does, written for people who just need the device to work.
Feature Focused
A close look at the parts that matter: filtering, device claiming, redirection and the user-mode API.
Organised Resources
Installation, compatibility, updates and troubleshooting grouped so you can jump straight to the answer.
User Friendly
Useful whether this is your first driver install or you are debugging a redirection stack you already run.
What Is usbdk driver?
UsbDk is a USB filter driver for Windows. A filter driver sits alongside the existing driver stack for a device rather than replacing it, which means it can intercept and route traffic while the original driver remains installed. On top of that kernel-mode component, UsbDk provides a user-mode library and API so ordinary applications can enumerate USB devices, claim one exclusively, and then issue transfers to its endpoints.
The reason that matters is historical. For a long time, giving a Windows application raw access to a USB device meant swapping the device’s driver for a generic one such as WinUSB or libusbK, usually with a tool like Zadig. That works, but it is destructive: the device stops behaving normally for every other program on the machine until the original driver is restored. UsbDk was designed to avoid that trade-off by hooking in as a filter instead.
The driver came out of work on USB redirection for virtualisation — passing a physical USB device from a Windows host into a guest virtual machine or a remote desktop session. That is still where most people meet it: it is commonly bundled with, or recommended alongside, SPICE and QEMU-related client tooling on Windows. Because the project is open source and its behaviour is well defined, other software has adopted it too. Notably, libusb ships a UsbDk backend, so cross-platform tools built on libusb can reach devices on Windows without asking users to rebind drivers.
What UsbDk is not is a device driver in the everyday sense. Installing it will not make an unsupported printer or webcam suddenly work, and it does not add features to a device on its own. It is plumbing: infrastructure that other software builds on. If an application’s documentation asks you to install it, that application is the thing that will actually use the device — UsbDk simply makes the connection possible.
Independent resource. usbdkdriver.com is an informational site. It is not owned, operated, endorsed or approved by the maintainers of UsbDk, by Red Hat, or by any related project. Always download software from the official project or from your vendor.
- Type: USB filter driver for Windows
- Components: kernel driver + user-mode API
- Original driver stays installed
- Used for USB redirection to VMs and remote sessions
- Available as a libusb backend on Windows
- Open-source, publicly developed project
Rebinding a device to WinUSB or libusbK with a driver-swapping utility. It works, but the device is no longer usable by its normal software until you put the original driver back.
usbdk driver Features
The driver is deliberately narrow in scope. These are the parts that matter in practice.
Filter-driver architecture
UsbDk attaches to the USB stack as a filter rather than taking over the device permanently. The driver the device already uses stays registered, so nothing is uninstalled and nothing needs restoring afterwards.
Exclusive device claiming
An application can ask UsbDk to take a device for its own use. While the claim is active, traffic is routed to that application; when it releases the device, normal handling resumes.
Redirection support
Its original purpose. UsbDk gives virtualisation and remote-session clients a dependable way to hand a physical USB device on the Windows host through to a guest or a remote machine.
User-mode API
Alongside the kernel component there is a documented user-mode interface for enumerating devices, reading descriptors, claiming a device and performing transfers, which is what application developers actually code against.
libusb backend
libusb can be built to talk to UsbDk on Windows. Cross-platform utilities that already use libusb elsewhere gain a Windows path that does not require end users to swap drivers first.
Endpoint-level transfers
Control, bulk, interrupt and isochronous traffic patterns are the domain UsbDk operates in, so software can work with a device the way its protocol actually expects rather than through a narrow shim.
Straightforward installer
The project is distributed as a Windows installer package that registers the driver and its supporting files. Installation needs administrator rights, and a restart is a sensible precaution afterwards.
Open development
Source code, issue history and releases are public. If you need to know exactly how a behaviour is implemented, or whether a bug is known, you can read the repository rather than guess.
How usbdk driver Works
Four stages, from a driver sitting quietly in the background to an application talking directly to a USB endpoint.
The driver loads
Once installed, the UsbDk kernel component is registered with Windows and becomes available to the USB stack. It is idle until something asks it to do work.
A device is enumerated
An application uses the UsbDk API to list connected USB devices and read their descriptors, so it can identify the one it wants by vendor and product information.
The device is claimed
The application requests exclusive access. UsbDk filters the device so that traffic is directed to the requesting process instead of following its usual path.
Transfers flow
With the claim in place the application issues transfers to the device’s endpoints — or forwards them into a virtual machine. Releasing the device returns it to normal behaviour.
Why people search for usbdk driver
Most visitors arrive here after seeing the name somewhere unexpected — in an installer, in a prerequisites list, in an error message, or in the Programs and Features window during a clear-out. The questions cluster into a handful of recognisable shapes.
“Something installed this on my machine — what is it and can I remove it?” If you did not install it deliberately, it almost certainly arrived with virtualisation, remote-desktop or device-development software. Check what depends on it before uninstalling.
Understanding what it is
Working out whether an unfamiliar entry in the installed-programs list is legitimate software or something to be suspicious of.
Features and scope
Checking whether the driver does the specific thing a project needs, before committing to it as a dependency.
Compatibility
Confirming that a given Windows edition, architecture or build is covered by the release being considered.
Installation questions
Finding out what the installer changes, whether a restart is needed, and what administrator rights are required.
Updating safely
Understanding whether an existing version should be removed first, and what to do if an upgrade leaves things in a bad state.
Troubleshooting
By far the largest group: a device that will not appear for redirection, or an install that refuses to complete.
Removal
Uninstalling cleanly when the software that required it is gone, without leaving a stale filter behind.
Alternatives
Comparing it against driver-swapping approaches, or against a hypervisor's own USB passthrough implementation.
usbdk driver Compatibility
Support depends on the specific release you install, so treat the following as a checklist of things to verify rather than a fixed promise.
Operating system
- Windows desktop platforms
- Windows Server editions may differ
- Check the release notes for the exact build
Architecture
- 32-bit and 64-bit builds have both been published
- Match the installer to your Windows architecture
- Newer architectures depend on the release
Driver signing
- Ships as a signed kernel-mode driver
- Signing requirements vary by Windows version
- Test-signed builds need extra configuration
USB devices
- Aimed at general USB device access
- Behaviour varies by device class
- Composite and hub cases can differ
Software that uses it
- Virtualisation and remote-session clients
- libusb-based tools via its UsbDk backend
- Custom applications using the API
Versions
- Capabilities and fixes change between releases
- Some issues are release-specific
- Always read the notes for your version
Verify before you install. Compatibility details change between releases. Confirm the supported Windows versions and architectures in the release notes for the exact build you are downloading, and confirm what the application that requires it expects.
How to Use usbdk driver
A practical order of operations, from deciding whether you need the driver at all to leaving yourself notes for the next time something changes.
Confirm you actually need it
Check the documentation for the software that prompted the install. If it names UsbDk as a prerequisite for USB redirection or device access, you need it. If nothing on the machine asks for it, you probably do not.
Get the right build
Obtain the installer from the official project or from the vendor whose software depends on it. Match the architecture of your Windows installation and note the version number for later.
Install with administrator rights
Kernel drivers cannot be registered from a standard user account. Run the installer as an administrator and let it complete without interruption.
Restart if prompted
A restart lets the driver attach cleanly to the USB stack. Even when the installer does not insist on one, rebooting before you start testing removes a whole class of confusing symptoms.
Connect the device and open the application
Plug the USB device in directly where possible, then launch the software that uses UsbDk. The device should now appear in that application’s redirection or device list.
Claim, use, release
Select the device in the application to claim it. While it is claimed, other software on the host will not have normal access. Release it when you are finished so the machine behaves as usual.
Note what worked
Record the driver version, the application version and the device details. If something breaks after a later update, that short note is the fastest route back to a working state.
How to Install usbdk driver
The stages below apply to a normal desktop install. Exact prompts and supported platforms vary between releases and between the applications that bundle it.
Requirements
A supported Windows version, an account with administrator rights, and enough free space for a small driver package. Confirm the architecture of your Windows installation before downloading, and check whether the software that needs UsbDk expects a particular version.
Preparation
Create a restore point if you are working on a machine you cannot easily rebuild. Close applications that hold USB devices open, and note any other USB filter software already installed — competing filters are a common source of odd behaviour.
Installation
Run the installer package as an administrator and accept the driver installation prompt if Windows shows one. The package registers the kernel component and places its supporting files; the process is short and needs no configuration during setup.
Configuration
There is little to configure in the driver itself. The settings that matter live in the application using it — which device to redirect, and when to claim it. Consult that application's documentation rather than looking for a UsbDk control panel.
Verification
Check that the entry appears in Windows Settings under installed apps, and confirm the driver is present in Device Manager with the system devices shown. Then test with the actual application: the device should now be selectable for redirection.
Updating
Read the notes for the new release first. In many cases the recommended route is to remove the existing version, restart, and then install the new one, rather than installing over the top. Keep the previous installer until the new version is proven.
On downloads and platforms. This page does not host files or link to unofficial mirrors. Use the official project release or the vendor package that your software points you to, and check the notes for that release — installation steps and supported platforms are not identical across versions.
What makes the approach interesting
Access the device without dismantling the driver stack
The awkward part of raw USB access on Windows has always been the trade-off: to talk to a device directly you had to take its driver away, and taking its driver away broke everything else that used it. UsbDk sidesteps that by filtering rather than replacing. The device keeps its identity and its original driver; access is granted for as long as an application needs it and handed back afterwards.
Reversible by design
Claiming a device is temporary. Release it and the machine goes back to treating that device exactly as it did before.
One driver, many tools
Several unrelated applications can build on the same installed component.
Readable source
Behaviour can be checked in the public repository instead of assumed.
Built for redirection first
Its origins in virtual-machine USB passthrough are why the redirection path is the best-trodden one.
usbdk driver Comparison
A comparison of two general approaches to raw USB access on Windows. Neither is universally better — the right one depends on whether the device also needs to work normally, and on what your application supports.
| Aspect | With usbdk driver | Driver-replacement approach | Notes |
|---|---|---|---|
| Device access method | Filters the existing stack and claims the device on request | Device is rebound to a generic driver such as WinUSB or libusbK | The filter approach is non-destructive |
| Original driver | Stays installed and takes over again once released | Replaced until you manually restore it | Matters on machines that also use the device normally |
| Setup for end users | Install a driver package once, then use the application | Usually involves a driver-swapping utility per device | Fewer per-device steps with a filter |
| libusb on Windows | Supported as a libusb backend | libusb also supports WinUSB and libusbK backends | Backend choice depends on how libusb was built |
| VM / remote redirection | Designed for this case and commonly bundled with such clients | Depends on the hypervisor's own USB implementation | Feature parity varies by product |
| Privileges required | Administrator rights to install a kernel driver | Also requires administrative driver installation | Both touch the driver store |
| Scope of change | System-wide component used by any compatible application | Per-device binding that only affects that device | Different blast radius if something goes wrong |
The table scrolls sideways on small screens so nothing is cut off. Specific behaviour always depends on the versions of the driver and the application in use.
Strengths and trade-offs
usbdk driver Highlights
- Gives applications raw USB access without uninstalling the device's own driver.
- Access is temporary — release the device and normal behaviour returns.
- A single installed component can serve several unrelated applications.
- Well suited to USB redirection into virtual machines and remote sessions.
- Available as a libusb backend, which helps cross-platform tooling on Windows.
- Open source, so behaviour and known issues can be checked directly.
- Small, focused installer with essentially nothing to configure.
Things to Consider
- It is infrastructure, not a device driver — on its own it adds no new device functionality.
- A kernel-mode component means administrator rights and a small amount of system risk.
- Other USB filter software on the same machine can interact badly with it.
- Behaviour differs between releases; a fix in one version may not exist in another.
- While a device is claimed, other software on the host loses normal access to it.
- Some device classes and composite arrangements behave less predictably than others.
- Support depends largely on the application using it rather than on the driver alone.
Common usbdk driver Problems & Solutions
Most reports fall into a small number of recognisable patterns. Work through the likely reason before changing several things at once — it is much easier to identify what fixed the problem.
The device does not appear for redirection
Likely reason. The driver may not have attached to the stack yet, or the application is looking at a different device.
Try this. Restart the machine after installing, reconnect the device directly to the computer rather than through a hub, then reopen the application and refresh its device list.
The installation will not complete
Likely reason. Installation is being run without administrator rights, or a previous version is still registered.
Try this. Run the installer as an administrator. If an older version is present, remove it from installed apps, restart, then install again on a clean state.
Windows blocks the driver
Likely reason. Driver-signing enforcement, security software, or a policy on managed machines is refusing the kernel component.
Try this. Confirm you are installing an official signed release rather than a repackaged copy, check whether endpoint security is intercepting it, and on a work device ask whoever manages the policy.
Another USB tool stopped working
Likely reason. Two filter drivers or a previous driver rebinding are competing for the same device.
Try this. Review what other USB filtering or virtualisation software is installed. Where possible test with only one in place, and restore any device that was previously rebound to a generic driver.
The device disconnects during use
Likely reason. Power management, cabling, hub behaviour, or a transfer pattern the setup handles poorly.
Try this. Try a different cable and a rear port on a desktop, disable USB selective suspend for that port, and check whether the same device is stable when used without redirection.
An update made things worse
Likely reason. The new release behaves differently for your device, or the upgrade left mixed files behind.
Try this. Uninstall completely, restart, and install a single known version cleanly. Keep the installer that previously worked so you can return to it while you investigate.
Uninstalling leaves traces
Likely reason. Removal happened while a device was still claimed, or the machine was not restarted afterwards.
Try this. Close everything using USB devices, uninstall from Windows Settings, then restart before checking Device Manager again with hidden and system devices shown.
The application errors instead of listing devices
Likely reason. A version mismatch between the application and the installed driver, or the application expects a different backend.
Try this. Check the application’s documentation for the driver version it targets, and confirm whether it needs to be configured to use this backend rather than another one.
usbdk driver Tips & Best Practices
Write the version down
Record the driver version and the version of the application using it somewhere you will find again. When a future update misbehaves, knowing the last good combination turns a long investigation into a two-minute rollback.
Test on one machine first
If several people depend on the same setup, prove a new release on a single machine with the actual device before rolling it out. Driver changes are cheap to test and expensive to undo at scale.
Cut out the middlemen
When something will not connect, plug the device straight into the computer. Hubs, docks and long cables introduce their own failures that look exactly like driver problems.
Keep filter software to a minimum
Multiple USB filtering or virtualisation packages on one machine are a common source of strange, hard-to-reproduce behaviour. Remove what you no longer use.
Release devices when you finish
Leaving a device claimed is the usual explanation for a scanner or reader that has mysteriously stopped responding to its normal software. Close the session properly.
Read the release notes
They are short, and they are where breaking changes and known issues are actually recorded. Two minutes there regularly saves an afternoon of guessing.
Complete usbdk driver Guide
Where the driver sits in the system
Windows handles USB through a layered stack: controller drivers at the bottom, hub and port drivers above them, and a function driver at the top that gives the device its personality — a mouse, a printer, a serial adapter. A filter driver inserts itself into that chain without becoming the function driver. That position is the whole point. It can observe and redirect traffic while leaving the arrangement Windows already established intact.
UsbDk pairs that kernel-mode filter with a user-mode library. Applications never talk to the kernel component directly; they call the library, which enumerates devices, hands back descriptor information, takes claims and passes transfers through. For an application developer it looks like an ordinary API. For the machine it means one installed component can serve many programs.
Who it is for
Three groups, roughly. The first is anyone running virtual machines or remote sessions who needs a physical USB device to appear inside the guest — a security key, a programmer, a licence dongle, a camera. The second is developers building cross-platform tools on libusb who want their software to work on Windows without asking users to run a driver-swapping utility first. The third, largest and least voluntary group, is people who found the name on their computer and want to know what it is. If that is you, the short answer is that it is legitimate open-source software, and it almost certainly arrived as a dependency of something else you installed.
Requirements and compatibility in practice
Practically, you need a supported Windows version, administrator rights, and a build matching your system architecture. Beyond that, the honest answer to most compatibility questions is it depends on the release. Supported platforms, fixed bugs and device-class behaviour all move between versions, which is why the release notes for your specific build are more reliable than any general summary — including this one. Composite devices, hubs and unusual device classes are the areas where differences show up most often.
Everyday use
Day to day, you will rarely interact with the driver. You install it once, restart, and then work entirely inside whatever application needed it. That application lists devices, you pick one, it is claimed for the duration, and it is released when you are done. The mental model worth keeping is that a claimed device is borrowed: while it is out on loan, the rest of the system cannot use it normally. Almost every “my device stopped working” report traces back to that idea being forgotten.
Updating and removal
Treat updates as a small maintenance task rather than something to click through. Read what changed, prefer removing the old version and restarting before installing the new one, and keep the previous installer until the new version has proved itself with your actual device. Removal follows the same shape: release any claimed devices, close the applications using them, uninstall through Windows Settings, and restart so the filter is properly detached. Skipping the restart is the usual cause of a half-removed state that produces confusing symptoms later.
When it is not the right tool
If your goal is simply to make a device work in Windows, this is not the answer — you need that device’s own driver. If your hypervisor already offers reliable USB passthrough and you have no other reason to add a kernel component, use what is already there. And if a single embedded device needs a dedicated generic driver on a machine that will never use it any other way, direct rebinding may be the simpler route. The filter approach earns its place when the device also has to keep working normally, or when several applications need access to the same hardware over time.
- Install once, per machine
- Administrator rights required
- Restart after install and after removal
- Configuration lives in the application
- Claimed devices are unavailable elsewhere
- Release notes beat general guides
Note the current driver version, the application version and the device’s vendor and product identifiers. Ten seconds of writing saves a great deal of guessing if the next step goes badly.
You will see the name written as UsbDk, usbdk and usbdk driver depending on where you look. They refer to the same USB Development Kit driver project; the spelling varies with the context rather than the software.
usbdk driver Download & Resources
The buttons below are placeholders, ready for you to point at the destinations you have verified. No download URLs are published here.
usbdk driver Resources
Project information, release history and the documentation that describes how the driver behaves.
Installation Guide
Step-by-step installation notes, including preparation, verification and what to do when an install fails.
Latest Information
Version notes, changes and known issues — the details that vary between releases and matter most before updating.
Download safely. Kernel drivers should only ever come from the official project release or from the vendor whose software requires them. Avoid third-party mirrors and “driver updater” utilities, check that the release supports your Windows version and architecture, and read the notes for that version before installing.
usbdk driver Frequently Asked Questions
Twenty questions that cover almost everything people ask about this driver, from the first “what is this?” to update and removal detail.
UsbDk, short for USB Development Kit, is an open-source USB filter driver for Windows. It combines a kernel-mode component that attaches to the USB stack with a user-mode library that applications call. Together they let software claim a USB device and communicate with it directly, without permanently replacing the driver the device already uses. It is infrastructure other applications depend on rather than a tool you operate yourself.
It installs as a filter alongside the existing driver stack rather than in place of it. An application uses the user-mode API to enumerate connected devices, identify the one it wants from the descriptor information, and request exclusive access. While that claim is held, traffic is routed to the application, which can issue transfers to the device’s endpoints. Releasing the device restores its normal handling.
The filter-driver architecture that leaves the original driver installed, exclusive device claiming that is temporary and reversible, support for USB redirection into virtual machines and remote sessions, a documented user-mode API for developers, and availability as a libusb backend on Windows. The project is open source, so its behaviour and its known issues can be inspected directly rather than inferred.
For most people there is very little to use. You install the package once, restart, and then work entirely inside the application that required it — that application handles selecting and claiming devices. There is essentially no configuration in the driver itself. The complexity, when it appears, is usually in the application or in the device rather than in the driver.
It is aimed at general USB device access rather than at a fixed list of supported hardware. In practice, behaviour varies by device class, and composite devices or hubs can behave differently from simple single-function devices. The most reliable test is the direct one: install the driver and check whether your specific device appears and works in the application you intend to use.
Obtain the correct build for your Windows architecture from the official project or from the vendor whose software needs it, then run the installer with administrator rights and allow the driver installation to complete. Restart afterwards even if you are not prompted to. Verify by checking the installed-apps list and then by confirming your device appears in the application that uses it.
Read the notes for the new release first, since behaviour can change between versions. The safest route is generally to uninstall the existing version, restart, and then install the new one on a clean state rather than installing over the top. Keep the previous installer available until the new version has been proved with your actual device and application.
The most frequent causes are a missed restart after installation, another USB filter or virtualisation package competing for the same device, a device connected through a hub or dock that introduces its own problems, or a mismatch between the driver version and what the application expects. Work through those one at a time rather than changing several things at once.
Confirm that the software prompting the install genuinely requires it, check that the release supports your Windows version and architecture, make sure you have administrator rights, and note any other USB filtering software already present. On a machine you cannot easily rebuild, create a restore point first. Close applications that currently hold USB devices open.
Yes, and this is worth taking seriously. Supported platforms, fixed defects and device-class behaviour all change between releases. A problem that exists in one version may be resolved in another, and a build that works for one person’s device may not be the build you need. Always check the notes for the exact release you are installing.
Because the project is open source, its repository, releases and issue history are publicly available, and that is the authoritative place for documentation and version notes. The vendor of whatever software required the driver is the other good source, since their documentation will state which version they expect. This site is an independent reference and does not host files.
Start by narrowing the problem down. Does the device work normally without redirection? Does it appear when connected directly rather than through a hub? Has the machine been restarted since the driver was installed? Is any other USB filtering software present? Answering those four questions resolves most cases before you need to look at logs or versions.
Yes. Release any claimed devices and close the applications using them, then uninstall it through Windows Settings or Programs and Features like any other application, and restart so the filter is properly detached. Bear in mind that software which depends on it will lose its USB access, so check what else on the machine relies on it before removing.
Note the version you currently have and the version of the application using it, keep the existing installer somewhere you can find it, and read the release notes for the new build. If the setup matters to other people, test the update on one machine with the real device before rolling it out more widely. Restart between removing the old version and installing the new one.
The driver installs on its own, but it does nothing useful by itself. It exists so that other software — a virtualisation or remote-session client, a libusb-based tool, or a custom application built on its API — can reach USB devices. If nothing on your machine uses it, installing it will not change anything you can observe.
Look at the installed applications list in Windows Settings, or Programs and Features in Control Panel, where the entry and its version are shown. You can also inspect the driver’s file properties in Windows Explorer, and Device Manager will show the associated system driver when you enable the display of hidden and system devices.
Devices that do not appear in an application’s redirection list, installations that fail without administrator rights, conflicts with other USB filter software, devices dropping out during use because of power management or cabling, updates that behave differently from the previous release, and removals that leave traces because the machine was not restarted.
The project’s own repository and documentation are the best starting point, since they describe the driver’s actual behaviour and its release history. The documentation for the application that requires it is equally important, because that is where the version expectations and configuration details live. This site organises the general picture around those sources.
No. usbdkdriver.com is an independent informational resource. It is not owned, operated, endorsed or approved by the maintainers of UsbDk, by Red Hat, or by any related project or company. Nothing here should be treated as official documentation, and software should always be obtained from the official project or from your vendor.
Three things. It is plumbing, not a device driver, so it will not make unsupported hardware work on its own. A claimed device is borrowed — while an application holds it, the rest of the system cannot use it normally. And details genuinely vary between releases, so the notes for your specific version are worth more than any general guide, including this page.
Explore usbdkdriver
Everything on this page is arranged so you can jump straight to the part you need — what the driver actually does, how to install and verify it, and what to check first when a device will not appear. Start wherever your question is.
Editorial note. usbdkdriver.com is an independent, unofficial information site about the UsbDk USB Development Kit driver for Windows. It is not affiliated with, endorsed by or sponsored by the project’s maintainers, Red Hat, or any other company or trademark holder named on this page. Technical details vary between releases; always confirm against the official documentation and release notes for the version you are using, and obtain software only from official sources.