My laptop has two built-in microphones and I have a USB sound card with two microphones built into it. Both recording devices show up in software but if I try to use either of them they output high pitched static for a few seconds and then go completely silent. The right channel always cuts out first. If I click on the "Recording" tab in the Sound dialog CPU usage maxes out and the box freezes until I kill it with the task manager. I have a Fujitsu Lifebook T4210. T2500 2.0 GHz Core Duo, 2 GB RAM, SigmaTel Audio (using latest vista drivers, no 7 drivers available). The USB sound adapter is a Turtle Beach Audio Advantage SRM. Thanks for any help. Edit: Also, everything works right if I boot into XP, so it's not the hardware.