Long time lurker, first time poster here. Seriously, I can't thank you enough. I know that those of you who posted solutions to this put in some serious time acquiring the knowledge to even begin to troubleshoot this issue. I have been running Media Center on Win 7 for over a year now and it has basically been bulletproof, up until now (on Vista for a year before that worked well too). I used to code so I know the digging and trial and error involved, and now just do "tech support" for my family. I can't wait until the day I have more time (i.e. kids grow up and move out) to actually contribute to efforts such as these.
What worked for me in the end was the DNS change (8.8.8.8/8.8.4.4), then mcupdate -uf -pscn 0 (twice) after nuking Media Center (mcupdate.exe -MediaCenterRecoveryTask). Probably didn't have to nuke, but I did after trying everything else (except the DNS change for some reason - stress most likely).
Additional info: Ceton Infinitv 4 Card: Had to repair/reinstall drivers before Media Center would see the tuners.
Again, THANK YOU TO EVERYONE WHO PUT IN TIME ON THIS, YOU KNOW WHO YOU ARE.
-dmac






