If Win2k is reinstalling the driver without prompting at reboot, examine the "Driver Details..." button in Device Manager and manually delete the listed files from your hard drive. Makes it hard for the OS to reinstall it without the files 🙂 If any of the files are mirrored in the WINNT\System32\dllcache folder, delete those as well. Then go back to Device Manager and remove the entry for the enhanced keyboard.
When you're done, reboot and see if the problem persists.
[edit] Just occured to me that you can probably simply use Update Driver, let Windows search for drivers, and force it to use a standard keyboard driver. If you haven't already deleted the driver files, Windows should find multiple suitable drivers. Check the box that says something like "I want to install one of the other drivers" and pick the standard mode. [/edit]
Best regards,
Floyd