Got one of them downstairs, we simply had to diversify. 😛
So the CyberPower is in place, runs nicely – apart from a bit of a hiccup on boot probably from the loose USB connector plug.
Another thing, the PC rebooted immediately after shutdown last night, do recall an adjustment of voltage thresholds cured this a while ago on a downstairs rig. In the meantime trying out the solution from this thread:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
And setting the value of PowerDownAfterShutdown to 1. 🙂