OK so its more of an annoyance than a problem. But boy is it annoying. At random intervals my computer (win xp) makes two clicking noises (via the sound card). I have no idea where these sounds are coming from and I have eliminated all the usual suspects. I have managed to capture the sound here. http://home.vicnet.net.au/~cbrindle/strange_sound_in_windows_xp.wav Any ideas?