That one puzzles me. Install of RC started from Vista but clean install - freezes at first reboot - reboot safe mode continues - next reboot works ok - next reboot freezes - reboot safe mode succeed to boot but failed to continue setup because cannot be done in safe mode - normal reboot, works fine Install is finished. Until then I assumed it was a driver problem. But now all drivers seems ok. No yellow marks. And still every other reboot freezes - very early in boot process almost soon as the 4-color motif is completed. This is a hard freeze which require a reset button use. Then restarting the exact same way works. (I do not use the Repair option it proposed). Motherboard is K9N Platinum, chipset is the MCP570Ultra, windows 7 driver are more recent than latest from nVidia so I did not downgraded them. PS: was same problem in beta but I assumed it was due to being still beta back then.