So it looks like Windows 10 cannot find my OS and therefore wont' boot up. Yay. I've detached all other drives except the the 4 on the RAID w/ Windows 10 installed.. In the BIOS, I see those drives are recognized. I have unplugged and reconnected all the SATA cables and loaded optimized defaults on my BIOS, to no avail. I don't have a CD/DVD drive on my comp so I guess my only option is install something on a thumbdrive that will let me recover Windows? Can anyone suggest where I can get that? I'm typing on my laptaop and can install something on a thumbdrive, Any other suggestions out there if there are other options? Thanks.