When running Windows 7 via Bootcamp, I am getting a sound that I think means a device has been disconnected, over and over again.. happens about every 30 seconds or so. When this happens my mouse freezes momentarily, some times for a few seconds. When the mouse is frozen, the MBA trackpad still works. I have installed the driver for the mouse. The mouse is connected connected to my Thunderbolt display (via the keyboard). Is this a Thunderbolt issue? Any advice on how to resolve this?