i'm not much of computer person. BUt here goes anyways.

I turn on the powerbar on. Next i turn on the computer. I hear the computer running like normal, but it doesn't go through the loadin up screen. All i notice is the sound of the computer humming like normal and both my cd drive light on the front of the computer both flashing very fast. I had my buddy slave my hard drive to his computer BASICALLY get rid of any virus. He got rid of all the viruses. Ok maybe that will fix it, brought home and did the same thing as above.

Before this all happen i was playing a game. the computer froze. like this happen once inawhile so i go to reboot. but it won't reboot. So i turn bow bar on and off. when computer turns on it does what i said up above, but 5 minutes later it loads up and goes to the deskstop. ok that was weird and went back to playing around my computer. It freezes again, oh great now what. it won't reboot so i POWER of the powerbar and turn back on, but this time it  takes a hour to get to desktop. AN it freezes again and it won't load up.

Any idea be very appreciated  thankyoumore info on system needed...joe..and any stop errors or any other messages...all i get is black screen, nothin and yes the monitor works LOL, so i get no message. looks like it trying to do something but it won't go through the loading up process it does when you starrt your computerReinstall the videocard.What is your OS? And how old is the computer?
Is this computer connected to the INTERNET?
If so.....if you have Screen Shot, Weather Bug, or any other simular programs that ACCESS the internet in the background, and then was palying games on computer..
you may need new motherboard. I've only seen a similar problem one time, and it was caused by a bad cdrom drive. Disconnect the cd's power plug and see if it boots OK.