I have one of these:
It doesn't want to communitcate with my computer at all, whenever I plug it in nothing happens
I've tried
-restarting
-pressing and holding the little button (IIRC, it turns the device on and off)
-using different USB ports
-viewing the troubleshooting guide
-plugging it into another computer, still the same thing
I may have dropped it once in the past, but microsoft can't be that shitty can they >.>