Make a shortcut to a Powershell script to play your sound, then add Shutdown ..../t 0 as the last line. Click the shortcut to shutdown the PC. Shortcut Target below (Run: minimized).
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Many thanks. I had set Group Policy to enable this and it failed. Now I used the Regedit link (set to 1) and all is now OK, ie no blur at all.

Windows 10 2004 update. My Lock Screen is not blurred at all but as soon as I click to Login it does become blurred while I enter my password. I have used the Group Policy to try and fix this but I...

I ran the script above and, after taking about 20 minutes, it eventually worked. Many thanks.

Many thanks; I will give it a try later.

Do you mean I must right-click the folder, then Security followed by Edit/Advanced?

Recently my computer became inoperable so I removed the hard disk and fitted it into a USB case. I now need to access the previous Admin account folder to retrieve some files, but Windows says I need...

Now retired. Worked at Rutherford Laboratory (UK) in the 60s (Bitnet, via DARPA, before the Internet) on IBM 360/195, followed by some years with Amadeus Global Ticketing in Germany.
Now can code in...