I have windows 2000 on my computer. I turn off all the sound in the control panel, disable the sound card. Still, everytime I click close button or when messages pop up, there a beep come from my computer. I also turn off the speaker. I went into the bios, and disable the sound card too, still the damn annoy beep still bug me. Can anyone help me to turn the beep off for good? Is there any service that I need to close? Thanks