Error message at startup re: can't find file "DRI_KBFiltr"

When Windows starts up, I know have an error dialog box
that says something like: "Cannot find file
\\.\DRI_KBFiltr"

Apparently it's some keyboard hotkey filter, as I found
in Regedit. I'm a little reticent to just delete the keys
in the Registry, and I can't seem to find anything in
MSconfig.

Also, I have found the file in WINDOWS\SYSTEM32\DRIVERS.

 

http://support.microsoft.com/?kbid=318031
See if this article from microsoft helps.