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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
It won't solve the underlying problem, but you can disable those sounds (via the control panel) to preserve your sanity. – Velociraptors – 2010-09-25T22:24:49.407
1Also, some systems use internal USB connections. It may not be a problem with your USB ports. Is there any other strange behavior when the sounds are more frequent? – Velociraptors – 2010-09-25T22:29:22.487