That should be ok
Back to the Windows error, try running from an elevated command prompt “sfc /scannow” (without the quotes). Let it do its thing, and see if it helps.
I tried as shown and at the C: root and got this message both times. What do I do to fix it?
From the start menu choose command prompt (admin)
Nope! BTW: Does the style exist in the path referenced in the error?
That’s strange. The Components, Materials, and Styles folders are all empty!
The same files for my several prior years (2018-21) are also empty.
Did you already try the reinstall with the Repair option?
This seems to indicate some sort of permissions issue. Maybe a repair of Windows is necessary.
I have also sometimes had the installer OK/Cancel window open behind other windows on my desktop.
Here are the results.
When something crazy is going on, I always suspect Antivirus software, do you have any installed?