my friend just got a p4 1.5 pc....the problem is every time the pc boots (into 98se)...there's this annoying pop (sound like a small explosion) sound...and it happened even after i shut down the pc...it has a sblive 5.1 in it...with altec lansing 305(usb)....i've check everything...it's plug in propperly....so what seems to be the problem ? oh...the sound card is running ok i think....when i try to play audio CD and MP3...it sound just ok...nothing unusual....