ok last week i was playin call of duty 4 modern warfare 2 when all of a sudden my screen goes black with all kinds of blue dots...... i restarted computer and everything looked fine so i thought okay? maybe i had the reseloution too high... i lowered it and started to play again "has had the game for a while so it cant be that" well i started the game up and got into a game on multiplayer and not even a min after it crashed again. so i left it off for a while and consulted some friends as what to do..... one got the idea to do a system restore i did that today and it worked for about 20 min... then it came back after testing the pixils with starting off watching a vid then moved on to games to see if anything triggered it...note the computer was going very slow before the restore and that was fixed. but now its not runnin slow or anything i just have consant blue and yellow lines..... and still cannot play cod4mw2... any ideas on how to help me out. it would be much appreciated thanks