A short while ago, a strange blue window opened on boot of Win10, just before the actual Windows start page.
I thought it was down to the failure of update KB5034441 as many people have been saying it fails, and Microsoft still haven't fixed it.
If I click on RETRY, I get the "just a moment" message, typical of Windows Updates, with the spinning icon. But nothing happens. No messages other than that. So I click on Cancel, and Windows continues to load as normal.
I used wushowhide.diagcab to hide KB503441, but at boot the same window opens.
Sorry about the fuzzy pics, but my camera doesn't like taking screenshots.
