listen to crac, (but only this once
) and start threads like this in 'troubleshooting'
it’s there for a reason.
use it.
or die.
but to address your problem,
you say the whole UT directory is 'gone'?
if your INF install was on a FAT partition and particularly if you are running windows 9x, the #1 thing you should do is search every partition for 'infiltration.exe' or some other unique file that would be in the missing directory.
if you were using FAT32 or similar there is a good chance that the file system mishandled a bunch of crap (usually because the user improperly shut down the machine, ie: just pulled the plug) and seemingly picked up your INF and moved it to some dusty corner of the drive.
If you can locate it, you should be able to simply move it back.