Time for the good old DOS prompt I feel
If you are using 95/98 restart in DOS mode....AFTER putting a copy of the CTL3D32.dll file into the C
dir then
type in copy c
CTL3D32.dll c
windows\system\CTL3D32.dll
say yes to the overwite query
Restart
If you are using ME or XP you will have to use a bootable floppy to start your system in DOS