So about 3 out of the four games I've played so far have locked up for me. Usually happens near the very beginning (not even one minute into the game). The screen goes grey (although it went green the first time), and I can see some vertical grey lines going down the screen. I can still hear the music playing but am unable to do anything with my computer and must shut off the power manually to restart it. I've tried the graphics settings on high and medium so far.

System specs:

Operating system:Windows 2.6.0.6000 ()
CPU type:Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz
CPU Speed (GHz):2.148
System memory (GB):1.997
Graphics card model:ATI Radeon HD 4670 1GB
Graphics card driver:atiu9pag.dll
Desktop resolution:1680x1050

Please post on the Beta technical forum, you'll most likely receive an appropriate answer there :)