I had CFS3 installed and working in Win 7 64 bit not long ago but has other issues and had to reinstall my OS. Now for some reason I can't install CFS3 at all. I start the setup and within a few seconds of selecting either custon or express setup, the entire system locks up solid and I have to do a hard shut down/reboot. What would make it lock up just in the set up? I had this installed and operating before and never had any issues like this.

Asus G73
i7 QM720 Quad Core 1.6 ghz
8gb DDR3
Radeon HD 5870 1gb DDR5
Windows 7 Home Premium 64 bit