Specs: (copied and pasted)
For TF2 I can play for a little while, then the screen goes weird (black, red and white bars, different things happen) and the audio loops.
For Borderlands 2 I play for a little while again, and then I get blue and white bars while the audio doesn't loop. I can't ctrl+alt+del or alt+tab out of either when it happens. I have to hold down the power button until the computer shuts off.
I'd really appreciate it if anyone could help me.