I just installed Windows 7 Ultimate 64 bit onto a Samsung 840 250GB SSD and whenever I shutdown using the start menu, it'll say Shutting Down.. for about 10-15 minutes, then BSOD and give me "Driver Power State Failure". However, when I have Windows on my Seagate Barracuda 1.5TB HDD, it shutdown correctly and no BSOD. I have the same drivers and such and have updated them all to the latest. Also updated the BIOS and SSD firmware. On the SSD, if I press the Case reset button while it says shutdown, it'll boot up in three seconds with no problems without the black Windows shutdown error screen.