Thanks Guys.
It can only be the BIOS.

I'll 2x check my settings.

My complacency was shattered with Microsoft's last major updates all of which I've removed from my machine to restore some semblance of normality. I rue the day that I ever installed Update 1703 &...

Thanks. I'll try this but having slept on the problem.....

I'm now of the opinion its nothing to do with my upgrade...or Storage Space creation.
It's likely to be idiot USER error.

That'd be...

Hello...this is confusing.


I installed Windows 10, upgrading from Windows 7. It went fine. Nothing of note in Windows.old.
I wanted to utilise W10 Storage Pool RAID 5 Parity option for data...