I made my UNRAID set everything up and realized this board wouldn't reboot. To not loose your work, go to the MAIN tab, select "flash" under Boot Device and click "FLASH BACKUP". This will create a zip file of your flash contents. For the following fix, this is what you copy back to your flash drive.
Found the solution from Sypower:
I used a linux mint iso but just pick one with rufus. When you copy the UNRAID files back to the flash disk windows asked if I wanted to overwrite duplicate files, the answer to this is absolutely NOT. Otherwise the fix does not work.
Also, my flash is set to "Permit UEFI boot mode" (my efi folder is "EFI" without the minus sign) although I don't think this BIOS has UEFI (I might be wrong) but this worked.
With the latest BIOS version 1701 08/16/2010 v2.61:
Advanced tab
USB Configuration:
USB Support: Enabled
Legacy USB Support: Enabled
USB 2.0 Controller: Enabled
USB 2.0 Controller Mode: HiSpeed
BIOS EHCI Hand-off: Enabled
USB Mass Storage Device Configuration:
your flash should be listed here
Emulation Type: Forced FDD
Boot tab
Boot Device Priority:
1st Boot Device: select your usb flash drive
Disable the others
Boot Settings Configuration:
Quick Boot: Disabled
Full Screen Logo: Disabled
AddOn ROM Display Mode: Keep Current
Wait for F1 if error: Disabled
Tools tab
Express Gate is disabled
Good luck and happy computing from Shibbysnacks