This is really aggravating... I got 2 BSOD's while installing Catalyst and it finally worked the third time. Now I'm trying to install Stream SDK another couple of BSOD's and now my computer doesn't boot. I get the "starting windows" with the balloons, then the fan on the video card spins up and the screen goes black. 

Looks like I'm going to have to install either Win7 x86 or Ubuntu 64-bit.