Originally Posted by AndyP
I've just had a similar problem. I installed Windows 8 on a new computer with just drive C installed and then added my extra SATA drives to copy my data from the old PC. They were recognised in the BIOS but didn't show in Device Manager or Administrative Tools. New Motherboard, new disks so no old incompatabilities.
My fix was purely by accident. I was in Admin Tools and saw "Memory Diagnostic Tools" and clicked on it as I've never seen it before.
After Windows rebooted after the test, all my drives were there!
Why it worked I have no idea but it did. Hope this helps.
Another user who made an account to say thanks to Andy P.
This worked for me as well. Can't figure out why it worked but hey, just go with it. I've now got my hdds back and that's all that matters.
His post needs to be stickied at the top of the Topic.