ahh! the patch thing was a joke

, i was just suggesting you get an NT based OS, but you are right, if you went with 2k or XP it would be better to format and reinstall, not just upgrade.
does your friend have anyway of backing up his stuff? if so then i would format and reinstall.
how persistent is this problem? once a week? or so often that windows ceases to function? (ie. everytime you try to open an app)