(Happy new year!)
We have a home theatre PC dating back to about 2006 running Windows Vista and Windows Media Centre with a FreeView DTB card. It was working perfectly. But, for some reason, Microsoft have stopped providing electronic program guide (EPG) data from 1st Jan 2013. So we can't see the programme guide (hence we can't schedule recordings, which is one of the main functions of our HTPC). It's not clear if MS have decided to kill off the service deliberately (they seem to have gone off WMC) or if it's just a bug.
UPDATE 3/1/2013: MS have just fixed their EPG data. It's working again!
Here are some notes for alternatives I've tried: