Live TV streaming erratic on Vista

[multirotor]

I have two streaming client machines: A Dell D620 with XP and an HP NC8000 with Vista.
Live TV works fine on the Dell but on the Vista machine, the video works fine for only 5 seconds and then starts to look like a slideshow. The audio is also behind on the video.

I have been looking for a solution for a few days but could not solve it.

Out of options, I have now erased the NC8000 and done a default install of XP on it.
Problem gone ! It even runs smoothly over wireless G now.
(The problem occurred on both wireless and wired ethernet on Vista).

Any ideas ? I have to move back to Vista because my Trust RC-2400 remote is not supported on XP.

Vista install was a default install as well without antivirus.
While looking for a solution I also applied all available Vista patches to no avail.

The server (XP) and client are 1.1.5 and the server has a PVR250 card.
All settings are default.

[multirotor]

I now have two ghost images for the NC8000. One with Vista and one with XP so I can switch between OSes in a few minutes.
The Vista problem remains. I have tried to update the display drivers with the latest ATI drivers but no help.
I have been doing network tests with ping -l 50000 -t serverip and the performance is the same on XP as on Vista.
I have checked the Vista power saving settings and everything is on full power now.
There is no firewall, no antivirus and I have used TweakUAC to turn al the fancy security settings off.

Here are the logs but I went through them and I can't find anything wrong. Anyone with a better trained eye ?

[sub]

Nothing stands out in the logs.

You could try using file mode instead of stream mode to see if it behaves any better.

[multirotor]

Thanks, Sub.
File mode gives similar (if not identical) results.
I get about one frame every 5 seconds.