Re-install Windows.

I had to shut down my left system, (I have two under my desk), when I restarted it, it didn't. Wouldn't go. The machine is fitted with two SSD's. Was the older SSD that was the boot source, seems non-functional. Boots into the BIOS, which shows the system components, minus the older boot SSD. So I removed it.
Trying to load Windows 8.1 x64 on the other, newer SSD from the original MS kit. Runs the basic stuff, asks for the key, accepts that, continues for a while then says reboot and continue... Rebooting does not go to Windows, it stops in the BIOS. How do I get the thing going again?

Further weird information... I tried again with the 32 bit version, same result, I then put another SSD on the machine with a Ubuntu system on it. Booted fine.....

How's the SMART data on the two Windows disks?
How to See If Your Hard Drive Is Dying with S.M.A.R.T.

I'm running the systems on the other machine down, so I can investigate this.