The suspect is an old Dell. I get audio stutter when playing back audio, and video stutter on video playback. Usually it's about 1-2 seconds of a fast stutter every 5 seconds four or five times, then it's okay for two to twenty minutes. I've already updated drivers, windows, tried different software, and even REINSTALLED windows with a fresh install.

I've ruled out the processor throttling down with Throttle watch. Other ideas?

System Info
Model : Dell Dimension 4300
Operating System : Microsoft Windows XP Professional Service Pack 2 (Build 2600)

Processor
Type : Intel Pentium 4 1500 MHz
Processors Bus Speed : 400 MHz

Graphics
Model : nVidia PCI NVIDIA GeForce4 MX 4000 (Microsoft Corporation) (PCI)

Memory
256 MB SDRAM DIMM PC133