So I have searched on this issue and made sure all of my Moto USB drivers were installed on my PC and I still can't mount my droid. Here's what happened: I was trying to install bootanimations and was in the "mount options" area in recovery. I mounted the SDcard and system (which i don't know if i was suppose to do while connect via USB) My PC froze an wouldn't turn back on (black screen) until i uplugged it and removed the battery. After I got the PC back up and running I tried mounting the droid again and now it doesn't even recognize the USB. Nothing happens on the droid either. Please help!