It turned out to be the sound driver. This one had driven many tech insane as all CDs worked as well as MP3s and many DVDs.
I will NOT dive into the gritty details but the theory is the DVD used the 5.1 stereo portion of the audio driver and that is where I guess the flaw was.
Finding the latest driver was not easy since it was some OEM motherboard by Fujitsu-Siemans. But a little sleuthing and we found it.
Your issue sounds oh so familiar.
PS. And yes, the Microsoft Update Driver button announced it had the latest drivers. I wonder if they'll ever fix that.
I have a rather awkward problem most of the times I try to watch a movie in my PC. The moment I insert the dvd disk in and starts to read then all of a sudden the pc automatically restarts.
I have a Pentium 4 in 3.0 GHz with Windows XP home, 512 MB Ram, 80GB Hard drive, LiteOn dvd-RW, and a VGA 128MB PCI-express.
The problem doesn?t appear in all dvd movies but in the majority of those. With common dvd (software content) and CDs there is no problem at all.