Are you using two antivirus at the same time? ::slight_smile:
Disable is not enough (never was). You need to uninstall (fully, completely, no files or trash registry keys left behind) one of them.
Crashes and conflicts will appear, sooner or later…

DLL (libraries) are bad removed from memory after being used, low-memory systems, etc. are some reasons for bad memory management of Windows 98.
I’m not a hardware or operational system specialist… I’m just an user that could say with some experience: Windows 9x and Me have lots of problems that were solved in NT systems (2000 or XP) and others in Vista.

Maybe Antivir works better on Windows 98.
But, take care, the support of Windows 98 by Antivir will end on June…
http://www.free-av.com/antivirus/allinonen.html