(Sorry to cross post this but I can't figure out how to delete this from another forum) Last night I did a clean install of Windows 7 Professional to replace my previous Media Center 2005. Media Center configured perfectly but several of the TV programs I pre-recorded in MC 2005 give me the message that "the program will not allow copying to another PC for viewing" when I play them...and blocks the recording from playing. Makes sense that they don't want copying, but Windows 7 apparently sees a new install of 7 on the same PC as a different machine and blocks the shows. A bit scary because this means if you have a large archive of favorite TV shows, you can only do an upgrade of Windows 7, not a full install. Has Microsoft commented on this? I can forsee some upset users.