I used to maintain Win98 machines and I noticed certain trends. There were certain registry entries that always looked corrupted. There were .tmp files building up in c:\windows\temp and c:\windows\tmp. And, certain files would often show up as corrupted time and time again.
Deleting those registry entries and those .tmp files, then re-installing the corrupt system files tended towards making a happier machine.
Re: I didn't get rid of windows 98 until 18 months ago...
I used to maintain Win98 machines and I noticed certain trends. There were certain registry entries that always looked corrupted. There were .tmp files building up in c:\windows\temp and c:\windows\tmp. And, certain files would often show up as corrupted time and time again.
Deleting those registry entries and those .tmp files, then re-installing the corrupt system files tended towards making a happier machine.