Download Autoruns -
https://learn.microsoft.com/en-us/sysinternals/downloads/autoruns
Unzip autoruns64.exe then right click and run as administrator.
When it finishes scanning, In the filter enter .scr - if that finds the windows11instaiiation.scr entry, right click and delete it.
If you can't find it, press ctrl + s and save the log, then share it on OneDrive, Google Drive or gofile.io
Post the link with your reply.
https://support.microsoft.com/en-US/onedrive/share-files-and-folders-in-microsoft-onedrive