I finally found the solution to installing KB5001330
It was to do with my VR headset. Yes, really.
Unplug it, run:
dism /online /remove-capability...

I tried Windows Update and via the direct download of KB5001330.

KB5001330 fails to install on my PC. It has a fresh Win10 install, installed from USB with the (supposedly) latest Win version from Media Creation Tool:
"Some update files are missing or have...

Turns out it was the crappy Gigabyte RGB Fusion software.
I only realised it is to blame when it failed to load correctly and all of a sudden the screen went to sleep as it should.
Uninstalled it,...

Energy report attached as txt.
The monitor is a Philips and I had it for over 3 years with various computers, it's never been a problem.
I did have the Gigabyte Platform Power Management utitlity...

Deleted

That is correct, /requests shows "None" everywhere.
Display timeout is set to 1 minute.

GUID Query below:
C:\Windows\system32>powercfg /query 381b4222-f694-41f0-9685-ff5bb260df2ePower Scheme...

I since disable the "hey cortana" feature, and the audio stream is no longer there, but the monitor still doesn't sleep (the whole PC goes to sleep just fine).

PolarNettles: The powercfg /requests reports under "System:" that with the Realtek Audio Driver an audio stream is currently in use (although there isn't any playback going on at this time!)
Energy...

Thank you for your replies!
The board is a Gigabyte Z370 Aorus Gaming 7 board and does indeed have LED lights on it. No software to control PSU or pump though. The CPU is not overclocked, the memory...

New PC build: 8700k, Z370 board, GTX 1080 Ti, Win 10 Home, all latest drivers and BIOS updates

The monitor won't enter sleep mode and the screen saver won't come on either.
Have tried resetting...

I'm sorry to bother everybody with yet another Start Menu issue, but I've tried various things and just can't get it fixed.
The only thing the Start Menu shows me when left clicking on it is a list...

My Win 10 installation boots fine and fast, but once I've entered my password it sits there for another 10 seconds - longer than the boot - before the desktop arrives, which is really annoying.
Is...