I've plugged, unplugged, booted, rebooted on three different computers and it does show up correctly on all of them but cgminer just says it's waiting for hotplug devices. I can post screen shots later of all the steps I take, how it shows up, etc.
I can also choose uninstall from device manager, let it get redetected by windows and it gets a Com port assigned again and goes back to working in bfgminer.
I do IT work for a living but not afraid to admit I am most likely missing something obvious, haha.
Ah in that case, you're probably afflicted by the usb3 incompatibility with the WinUSB driver. If you have a usb2 port, plug it into that.