Well, to my surprise, reinstalling while keeping apps and data went flawlessly. I'm now running Windows 11 Home x64, 25H2 installed on 3-18-26. So I tried diagnosing a connection. When I clicked Diagnose Connection, it took me immediately to the Microsoft Store. So, I was right that it fixed the error but you were right that it was a web link.

Dos that happen on your win 11?

btw: the link dodn't take me to something that might make Diagnose Connection work, it was a link to ChatGPT, Netflicks, and more apps.