Windows 11 has the strictest driver signing requirements of any Windows version to date. The Rockey4 driver (typically Rockey4.sys or R4USB.sys) was signed with SHA-1 certificates that are now blocked by default.
You have two paths: The “quick and dirty” way (turning off enforcement) or the “proper” way (forcing compatibility). I recommend the proper way. feitian rockey4 usb driver windows 11 top
Q: Is the Rockey4 driver free? A: Yes, the driver software is free. However, the dongle itself is a security key for paid software. You cannot use the dongle to run software you do not own. Feitian Rockey4 USB Driver on Windows 11 —
Q: Do I need to uninstall old drivers? A: It is best practice. If you are upgrading from Windows 10 to 11, it is often cleaner to uninstall the old Rockey driver via Control Panel before installing the new Windows 11 compatible version. I recommend the proper way
Q: Can I use a USB Hub? A: While modern drivers usually support hubs, security dongles are sensitive to latency. For the best stability, always plug the Rockey4 directly into the motherboard's USB ports.
Open Device Manager → Universal Serial Bus controllers → Right-click each USB Root Hub → Properties → Power Management → Uncheck “Allow the computer to turn off this device to save power”.