The last usb device you connected to this computer malfunctioned and windows does not recognize it!! Once this is done, restart the computer to check if this helps. i realize that zoom usb modem is not working after windows 10 anniversary update. There are no instructions in the packaging for os 10.6, 10.7, 10.8, or 10.9, but if you follow the instructions for 10.5, they'll work just fine.
