driver conflict is the only thing i can think of... win7 is new, so i can understand if some driver refuse to work properly. since you mention nvidia driver, some gfx card manufacturers did change a lot from the standard reference board, hence the win7 default nvidia driver might not be the source of the problem. otherwise, try to reset BIOS settings, ensure tight fit on all connections and RAMs.... if that still fails, i have no idea....
I have this same problem on a toshiba laptop.The 64 bit rtm will bsod but the 32 bit version installs fine. I am going to slipstream the windows updates into the 64 bit rtm disk and see if that will work.
remove any hardware that is not needed whilst you install, if you have onboard graphics as well as pcie use them instead etc etc,, might be worth a try... good luck!
Check in your bios if SATA disk is in EHCI mode.... You need SATA or IDE Mode to start Windows.... even Windows 7 erf... I had this problem because my DVD Drive is SATA too... and could be bootable only in EHCI... So i install in EHCI and then, after the reboot, i need to switch back in SATA standard mode...
You mean AHCI. (No such thing as "EHCI") And Windows 7 supports AHCI out of the box, at least with P43 and ICH10 chipsets. Likely would be fine in AHCI, unless your PC is newer than July, 2009. Because it likely will not recognize chipsets newer than the Windows 7 RTM date.