I'm running Windows XP Media Center Edition 2005 and had some problems with my existing Tuner Card - so I replaced the existing card with a Hauppauge WinTV-PVR 250 card - The Media Center has been working reasonably well, but once in a while the Cable TV signal would just vanish and Media Center wasn't able to re-sync the signal.

After much head scratching and web searching I found the answer on xpMCE.com - I needed to replace the WinTV-PVR 250 drivers, I needed version 1.18.21.22254, these can be downloaded from this site - http://www.shspvr.com/mce.html

After installing the drivers the Media Center sync'd straight away - Thought I would share this just in case anyone else was having similar problems.

- Mike