1. Flip the DMA to PIO and back per this article -> http://winhlp.com/node/10
2. Stop if that helped. Next research what chipset your PC uses (sorry I didn't get the exact model off your post) and get the latest chipset driver from intel.com. Once installed repeat step 1.
Dell Dimension with Pentium 4 / 3.00 GHz / 2.99 GHz / 1.00 GB RAM
Windows XP Home Edition Version 2002 SP2
Creative SB Audigy 2
After working fine for quite a while, I've noticed that my Logitech X-530 speakers crackle and pop all the time. This happens with headphones as well. I tried to update the drivers for the Creative SB Audigy 2, but no difference. When I disable this device, the noise stops.
Could my sound card be bad? I have cleaned all the dust from the fans and everything, and nothing has changed in the power supply / wiring that could be causing interference. Call me suspicious, but I have recently accepted the latest Windows Media Player update, only to find that my MP3 files won't play, so I had to rollback to the previous version.