My laptop has gotten into a mode whereby it makes the USB mount and unmount sound repeatedly in a random fashion. This is the two tone ascending pitch for mount and descending pitch for unmount. The frequency is intermittent, but the occurrence is about 4 every five seconds after resuming from hibernation and then slowly decaying over time to perhaps 2 every five seconds, but the rate ebbs and flows over time. Nothing is plugged into any of the USB ports.
Is this a known problem? Is there something in my registry that I can repair? Could this be a hardware problem with one of my USB ports or is this strickly a software issue?
Update, got this message from windows:
USB Device Not Recognized One of the USB devices attached to this computer has malfunctioned, and Windows does not recognize it. The location of the device is shown in **bold type**. - USB Root Hub (2 ports) |-- **Unknown Device** |-- Unused Port