Msn news spots has studder in audio and video motion.

I have a laptop that had XP-home on it, Removed OS and installed XP-Pro, it
has SP3 and all the updates with media player 11 installed, Java and
flashplayer I checked for malware, virus etc. and it clean. It has 2meg ram
and duo processor.
If you just play audio file from the internet it don’t miss a lick, but if
you play video and audio like youtube or msn news spot it studders.
I have run it on wireless and hard line and it does the same thing. The cpu
runs 50 to 90% and the pages file is 20% I don’t see a problem there. I
installed the latest video and audio drivers and that didn’t help. Also
installed realplayer to check it out and still does it.
Any suggestions?
Melvin Edward