How can my Windows not be up to date despite DISM = 100% and SFC = 100% at Build 1809?

Report any case the software "Xbox accessories

DISM is used to my knowledge v.a. To install features even during a review, the shell would only tell you that your version matches the Windows image used. SFC is used for error correction of system files, not their update. What build do you have the (win + r → "winver")? Currently the 17763.

17763. MS support is at a loss

Well, that's the current release version (1903 would be the insider build).

Does the software Xbox accessories come from MS itself?

Have you ever tried to discourage the software (via the Windows Store)?

I would not think of anything more.

Thank you. Everything directly from MS. This is probably called a singular problem.