Display Properties hang

I've researched this problem and there seems to be little information
for it.I am running Win98 SE and suddenly when I try to change the
color scheme in Display Properties, it hangs. Plus! also hangs when I
try to change themes. The graphic will change but not the windows
colors. Both trys shows a blinking curser and Ctrl Alt Delete shows the
programs are not responding.

I did have 2 virus that may have changed some registry entries. I
don't remember what they were but my computer was cleared with Norton
Antivirus. My display and video drivers are up to date. Any ideas
would be apreciated.

Thanks,

Renee