Solved Windows stuck in classic mode

[diamond0099]

Hello.
Today, around 10-30 minutes ago, my power suddenly went off then came back while I was on my PC.
I turned it on again, but noticed that it is stuck in classic mode.
The theme service is running in automatic mode.
Now here's the interesting part, I tried going to Control Panel > System and protections > System and then going to Advanced System Settings. I went to the Performance settings, and noticed the "Use visual styles on windows and buttons" and "Enable desktop themes" boxes were unchecked. I checked both, clicked Apply and then exited the settings. However, it still didn't enable back. I went to the settings again and saw that the boxes unchecked themselves.
This is very weird.
I request help, if my system specs are needed, i'll provide them in a reply.

 

[MilesAhead]

Do you have a restore point from before the glitch?

Power glitches are tricky because it is not easy to tell what got corrupted, if anything. A good idea to get some kind of UPS. Also for now it may be worth opening an elevated command prompt and running:
sfc /SCANNOW

if the restore point is not there or does not resolve it.

 

[Layback Bear]

After doing what MilesAhead has suggested could you check and make sure your boot options haven't changed.

 

[diamond0099]

Hello.
Today I turned on my computer, and the theme was back to normal.
Still, thanks for your help.