My radio was installed by an authorized pioneer dealer. However every once in the will it will reboot. Took it back and they said nothing was wrong with the radio. They even updated the software for me. Again, I'm driving listening to XM /radio / dvd / etc and it will reboot. Comes back on and continues to play. Is there a log file I can look at and see why its rebooting?

Don't know of any log file to see things like that. Whats the year make model of car it's in? Do you have an amps and subs? How old is your battery?