See, that would make sense, but no other games I own have this issue. They all run fine for hours at a time. No crashing even without a blue screen. Nothing.

Genuine thanks to everybody for the help so far.

Here's a screenshot from BlueScreenView: http://tinypic.com/r/2m03ra/5

I'll see if I can get a crash dump report and dxdiag up, too.

Any help in the meantime is appreciated.

Thanks!