It all happened after my mother installed some crappy emoticons(smileycentral I believe was the program) for yahoo messenger about 3-4 days ago(don't ask why she did this because I have no clue and yes it was a dumb decision).
Whenever I play warcraft 3 for over an hour the screen turns black with some weird lights and then I see that in all of the games I start after.I made a screenshot in another game:
http://myfreefilehosting.com/f/1f93aa003f_0.05MB
I currently own an Nvidia GForce FX5200 from 2006 and so far it hasn't shown any problems.
Basically the screen in w3 looks like the guy on the bike.
I'm sorry if this is the inappropriate section but I don't know where to ask this question.