Question Black screen after applying a theme

[Michael20]

Hello,

I was trying to edit a Windows Theme (NOT located in Resources/Themes but in my Downloads folder) with msstyleEditor and pressed "Test".
The corrupt theme was applied and I'm getting now a black screen.

I've read Fix Black Screen on Windows 10 Caused by Corrupt Themes | Technastic but that corrupt theme is not listed under Resources/Themes.

I've used xcopy aero "Downloads\Corrupt Theme" /i but I do not know how to run copy aero.theme "corrupt theme 01.theme".
What .theme file is Windows using now? And where is it located?

(Windows 10 20H2. Unfortunately I did not have a restore point).

I'd appreciate your help.

 

[rgd1101]

black screen on safe mode too?

 

[Michael20]

Thanks for replying.

Yes, black screen on safe mode too.

It happened to me yesterday with a theme under Resources/Themes.
Following the steps in https://technastic.com/recover-from-black-grey-screen-third-party-themes-on-windows-10/ I fixed it.

I didn't learn the lesson and today it happened with a theme in Downloads.
I think the question is: What .theme file is Windows using now?

 

[Michael20]

Themes applied via the "Test" feature are located in "C:\Users\Public\Documents\tmpXXXXX.msstyles".
Replacing that file has fixed the issue.