signals.. Plz help!? I had comcast at my old home, moved and now I have comcast in my new house. I thought I did everything the exact same BUT now I do not get a clear signal. I have 2 other tvs in the house but I prefer watching on my computer..... please help thank you thank you thank you!

Did you go through the whole setup process again?
http://www.krunker.com/2006/10/08/windows-vista-rc1-media-center-setup/
you will probably have to do that.