my computer screen will suddenly go black, and the computer will restart sometimes two or three times a day; I have a clean machine, always had anti-virus and/or firewall, defrag often, dump cookies & files often, never had a virus infection; have adaware and spybot; not always online when this happens, a few times have gotten "this computer has performed an illegal..." but not often; this problem started after two things: 1) i DOWNLOADED mozilla browser and then uninstalled it and 2) installed norton security--However (SIGH) the machine is 4 YRS old, running Win98SE, IE6..... :-/Lots of reasons....but to eliminate this...have you added a new graphics card...but i see the phantom ie 6 download?had a problem with ie it seems...ok here is what i would do in your case...either LOAD the win98se disk ...browse..this cd...locate the add ons folder then the pws folder...scroll down and click the setup icon which will re-install your system..without losing any files..or scanreg/restore command..or you could do this in the add/remove program... click the ie  6 program...and at  the splash screen..chose the options...i would remove it........and use ie5.5 INSTEAD its more stable...Download the latest Microsoft (Security) Updates.