ive been getting this screen a lot when i play games ill be playing for hours then it pops up and FREEZES my computer... only way to fix it when it happens is to restart it.. and some times when i do that it pops up 5-10 times in a row and takes me an hour to get back to playing my games. please help me figure out what this is and why its being caused... its been doing it for about a year now its getting worse!!!!ugh and of COURSE i cant add my picture... my screen goes all weird and freezes and it looks like a bunch of lines and they are all different colors and like MOVING side to side and its locked up when it does it and the screen looks kinda scary... Desktop or Laptop ? ?
Either way what are your system temps ? ?I am guessing this is due to over heating of system or Graphics(VGA) PROBLEM.
Try cleaning your system fan(s). If problem continues then it is due to VGA.
Try reinstalling LATEST drivers for your graphics or install a new graphics card in your system.

Specify your system configurations for more suggestions.