Interesting...the PC just reboots? I'd be very interested in getting to the bottom of this one.
Couple questions for you:
1 - You said you're using both, Pure Video and WinDVD? Why do you have 2 MPEG decoders?
2 - Exactly what steps do you take to make this reboot happen? Step by step?
3 - Rather than post the contents of the tuner.log and tuner.txt can you please zip them both up into a single file and attach the .zip file?
4 - Does the reboot happen only when you try using FireSTB?
5 - If it happens when changing channels only, what happens when you try to record?
Thanks!
Ghostlobster
Moved to another HTPC solution, so I'm no longer a Media Center user, but I like to keep track of its progress.