You might want to isolate your computer on a back up power supply to elimate the possibility that it is the wiring in your house! have you tried another power strip? It is hard to imagine, apart from audio acceleration or driver protocol issues what it might be, however, I get a large number of audible pops and clicks when playing mastered wave files back in Adobe Audition ( I have a project recording studio in my home). It bugged me until realized that, after mastering the CD audio onto CDrom that the clicks and pops were not on the Final mastered CD. I use on-board audio on a Intel 865 PEARL. I'm about to buy an audigy PCI card in hopes that the problem will go away but you seem to have a similar problem. I will try to monkey with the audio acceration issues myself and let you know what I find.