The LittleGuy, Windows 98 ‘asks’ for a format/reinstall from time to time, unfortunatelly… I aggree with Dave but, of course, you can make another test with other av. Remember, all other things in your machine will be good except that you won’t have the best av ;D

I have Windows 98 running smoothly with avast :-*
I had Norton in the past but, for any reason, I was successfull to remove it :-\