I'm Stumped! (Deferred Procedure Calls)

[Bill Bosler]

Something called DPCs (Deferred Procedure Calls) are punching holes in my MP3 playbacks. I can watch Process Explorer and everything's cool until the DPC number suddenly jumps from 1.5 to 13.5 for a second or two and scrambles the audio output. I've tried everything from changing sound cards to changing graphics cards, updating the CPU BIOS, deleting processes, updating drivers.... You name it, I've tried it. The motherboard is an Intel D102GGC2 running a 3 GHz dual-core processor with 2 GB of ram.
I can't find any clear answers researching this on the web. I wonder if this is a flaw in the chipset on the motherboard, or something running in the background that I can't find? I've disabled virtually everything except what's needed to run the system and I still get the same results.
BTW, the DPCs increase at rather regular intervals of about 30 seconds.