Ok, I was playing a game and my computer locked up suddenly. Naturally I restarted my computer. Heres the problem - it just hangs when booting up, like when it's in dos still. It counts the ram and mhz and maybe a few seconds after that it will just hang. And what's even weirder it doesn't hang in the same spot every time. I'll leave my PC off for a few hours and it will get almost to the part where it asks me to choose OS's. I opened up my PC and it was kind of dusty I noticed...but could this be the problem? I blew off all the dust and it still does the same thing. It can't be a irq conflicting or anything because I didn't change anything..just restarted my computer after it locked up. Please help!!!