Installed XBox media center, now can't get updates...?

Question

I have instealled Xbox media center and now I keep getting error 21 when I try to get Xbox live updates. Any ideas?

Answer 1

I assume you mean the old Xbox 1 and you mean installing the Media Center on a modded Xbox.
If you mean the "real" Microsoft Media Center on the Xbox 360, then ask the Microsoft support.

The sites below have instructions on how to Fix Error 21.