Recently, my optical USB mouse has started turning on and off randomly. Sometimes it works for a few seconds, turns off for a few seconds, etc., and sometimes it doesn't work for a minute or more. Each time it turns on or off it is accompanied by a noise I've never heard before, more like a thud than a beep. I found this thread: http://www.vistax64.com/vista-hardware-devices/143348-optical-usb-mouse-turning-off.html, but I haven't been able to use the same solution because I can't figure out what IntelliPoint is and how to install it. I also don't see the mentioned update when I go into Windows Update. I tried deleting the drivers, restarting and plugging in the mouse; it seemed to help but within a few minutes it was back to the same situation. And all this is complicated because I'm not using an English version of Vista. Any ideas?