Ok so my original Xbox RROD and after resurrecting it multiple time only for it to die again a week or two later I gave up and bought a new 250G S console.
Anyway I used my old xbox as an extender for media center in the past with no problem whatsoever. Now on the new slim console it keeps telling me I need to install the optional media center update (which is already installed). Nearly every time I want to stream a video I have to uninstall the optional update and download again to get it to work.
This problem is not unique to the media center as it also happens when I try to watch videos requiring the optional media update from a memory stick.
I've tried clearing the cache and reformatting the disk but it doesn't seem to make any difference. Having searched the web I've not come up with any new suggestions so would appreciate if someone here could help shed some light on this problem for me.