I have a PC with a WinFast (Foxconn) motherboard (NF4UK8AA) that I was running Windows 7 on. I had 3 1.5 terabyte drives installed in it, one with the OS, a second with data and a third a backup copy of the data drive. Everything worked fine. A friend of mine who is a lawyer had one of his main PCs go down before Christmas and needed it back up in a hurry. I removed my motherboard and got him back and going in a few hours, and ordered a replacement motherboard for him. When it came in, I put my WinFast board back into my machine. Now WIn 7 won't start. I get the little animation, but it reboots and starts over. When I look at the BIOS, my drives are only recognized as 500 meg. I started an new setup, but WIN 7 say I have no drives. I started and XP setup, and it only sees 500 meg, so I left everything alone, for fear of damaging the data on my OS drive. I know it's gotta have something to do with the drivers for the hard drives (RAID) related, even though I am not running RAID. But, the crazy part is, I remember it being so easy doing the install the first time. I can't understand how just taking the motherboard out and then putting it back in a week later could create such a problem.