Vista - DVD play problem, no error message

Hello,

I’ve just done a clean install of Vista Home Premium (OEM, 32 bit), and I
can’t get DVDs to play. Unlike the other posts that I see here I have no
error message, it just goes jerky for a moment and then stops while the audio
continues in a jerky manner.

From what I’ve read Home Premium should have the codec’s that it needs to
play an out of the box DVD, but for me it’s just not happening. All the
sample stuff like the welcome to Media Centre, the butterfly video that comes
as a demo, etc. seem to run fine. The problem is only with DVDs.

In terms of possible software conflicts the only stuff on it at the moment
is iTunes (with QuickTime) and Skype.

Any idea about what the problem is and how to fix it would be appreciated.

Thanks,