here is the problem. sometimes when i boot up the comp it will lock up while loading. i have to hit the button to turn it off and back on. sometimes it will lock up after working several hours. it will lock up and restart itself. the cursur wont move and you cant hit alt/ctrl/del. i have received 2 different ideas whats wrong. one tech says its a virus and they can get rid of it, but another person said its most likely a part going bad. one thing i was told to do is boot up the comp and do this: hit start run type cmd in run hit ok then a black screen comes up type chkdsk_/r and hit enter it will then ask if i want to do a disk check at the next start up. i should say yes, then restart the comp. that might fix the problem. any ideas?