When you restart after upgrading from Windows XP Home Edition to Windows XP Professional, you receive:
dri_kbfiltr could not be found
The driver for the DriTek Solutions' Multimedia Hotkeys software is NOT compatible with Windows XP Professional.
To resolve this issue, either look for an updated driver at DriTek Solutions or:
1. Start / Run / msconfig / OK.
2. Select the Startup tab.
3. Clear the cpatr10 check box.
4. Press OK.
5. Restart Windows XP Professional.
NOTE: Even though the dri_kbfiltr driver doesn't work, the hotkey mappings for Multimedia Hotkeys continue to work.