new system:
e8400
Asus P5Q Pro
4GB Crucial Ballistix PC2-6400
3 x SATA.
I've tried both Vista ultimate 32bit and x64 with same results:
it starts copying installation files and bar finishes, and then the 1st graphical screen appears (with the mouse icon). After several seconds, there is a split second read of the HD (I see the HD light come on for a split second) and then it hangs up, and the system reboots!
I've checked Memtest and memory is fine.....I've tried both versions of Vista and nothing.