Windows XP Media Center stopped working

Seems like a virus or spyware on the computer:
Uninstall any existing security program like norton or mcafee by using their removal tools from http://pcsafety.us/
from the same site download and run AVG antivirus free, Super Antispyware - update and perform a complete scan on all the drives.

If these dont work you need to run combofix but that may crash your pc so keep it as a last resort.

You can take it to geek squad but they wond do all this they will simply format your harddrive and you lose all your data.

Hope this helped!
Rate this fix if it worked'
Keshey

Hi, I have also had this issue. I would open Media Centre and it would either say that it has stopped responding or would shut down Media Centre without error. I played with a few things and was able to get in for a minute or so with the same issue mentioned above where it was unable to find my tuner. System Restore did not resolve the issue so I started thinking that maybe there was something else corrupt that was preventing Media Centre to run. One of my test was to rename all of my Recorded TV files (renamed *.wtv to *.bak). Success!!! Media Centre was then able to open and detect my tuner and allow me to take any normal actions. To ensure that this was not a fluke, I renamed all the *.bak files back to *.wtv and immediately was able to replicate the issue again.

I hope this information helps!