Vista Home x64 Install disc freezing up

I installed Vista Home Premium x64 upgrade on my PC and all was running well. Able to access internet, did vista software updates and was trying to get sound working on system. Uploaded realtek drivers from realtek. I rebooted and the system froze at the Microsoft Corp screen with the green status bar thingy. Waited 5 minutes with nothing happening. Rebooted to the install disc and I got the same problem, even the install disc freezes at the same screen. It seems that there is a problem with the bios not liking something that Microsoft wants to do, but I am not smart enough to know.

MB: ECS (Elitegroup) P45T-A v1.0
CPU: Q6700 2.66 GHz
RAM: 8gb Kingston - 2ea KVR800D2N6/4G
HDD: Western Digital 500GB
DVD: Pioneer
VIDEO: ATI X1900

Again, the system was working fine for a day or so while i was updating software.

Thanks for and help.

Try to use safe mode. If you can get in use system restore to return to good times.
http://www.vistax64.com/tutorials/76905-system-restore-how.html

Thanks for help. I shut the system down for a few hours, re-booted and all is working well. It has been on for almost all of yesterday and working perfectly now. Not sure what happened but I will leave it alone unless it happens again later.

Again, thanks for suggestion. I am upgrading to Windows 7 next week. I hope I don't regret it.

Cheers

If you are somewhat happy with Vista, you will love Seven. I had Vista for a year. When they had the preorder sale (Oct 09), I bought Windows 7 64 bit and I love it.