UsbDk is an open‑source USB Development Kit for Windows that lets user‑mode apps take exclusive control of USB devices the latest official release is v1.00‑22 (MSI installers available) and the project and documentation are hosted on GitHub.
This post explains what UsbDk is, why you might use it, how to download and install it, and how to get started using it on Windows.
Table of Contents
What is UsbDk?
UsbDk (USB Development Kit) is a Windows open‑source library and driver that lets user‑mode applications detach USB devices from the Windows PnP stack and access them directly. It supports bulk, isochronous, composite, and HID devices, and aims to be generic across device types. Supported Windows versions start from Windows XP/Server 2003 up to modern Windows 10/Server.
Features of UsbDk
- User‑mode exclusive access to USB devices.
- Supports all USB transfer types (bulk, isochronous, control, interrupt).
- Dynamic capture (no INF files required; capture and release happen at runtime).
- Helper tools and API: UsbDkHelper.dll and UsbDkController.exe for install/control.
Requirements
- Windows (XP and later; 32‑bit and 64‑bit supported).
- For building from source: Visual Studio 2015+; WDK 10; Windows 10 SDK; WiX Toolset (for MSI). For legacy builds (XP/Vista) WDK 7.1 is needed.
- Admin rights to install drivers and use persistent hide rules.
Download
- Official GitHub repository and releases: download MSI installers from the project Releases page (example: v1.00‑22 includes UsbDk_1.0.22_x64.msi and UsbDk_1.0.22_x86.msi).
- Project page and documentation: see the repository README and Documentation folder on GitHub.
Install
- Choose the MSI for your architecture (x86 or x64) from the Releases page.
- Run the MSI as Administrator and follow prompts.
- Verify installation with UsbDkController.exe (it can install/uninstall and show status).
How to use
- Use UsbDkController.exe to list and manage devices.
- From code, use UsbDkHelper.dll API to capture a device, perform reads/writes, and release it. See the UsbDkHelper headers and the Software Development Manual for examples and API details.
Troubleshoot
- Windows 7 x64 install fails if security update 3033929 is missing (SHA‑256 signing support). Install that update first.
- If a device won’t attach, check driver signing, admin rights, and that the device is not already held by another process. Consult the project’s ARCHITECTURE and manual for tracing tips.
Credit
Project: Daynix / UsbDk on GitHub. Primary docs: README, ARCHITECTURE, and the UsbDk Software Development Manual. Releases provide ready MSI installers.
FAQs
It’s open source (Apache‑2.0) and widely used for development; install only from official releases.
The project targets Windows 10 and earlier many users report compatibility on newer Windows but test in your environment.
Conclusion
UsbDk is a practical tool for developers who need direct USB access from user mode. Download the MSI from the GitHub Releases page and read the manual before building or deploying. If this guide helped, please leave a comment below with your questions or experiences.
