I'm running Win 2K SP 4.

When I open Windows Explorer and go to Tools>Folder Options>File Types,
Explorer searches for registered file types, but doesn't seem to find any to
produce a list. It just keeps on searching...

All other functions seem normal; file extensions are shown in the details
view of any folder, and file associations seem normal ( the right programs
open flles)

I've done virus scans using Norton & AVG, as well as Kasperksy Labs, and
found nothing.

Has anyone any suggestions for what be wrong, and how to fix it?