The first solution is to make certain that it is a DATA cable. It is extremely common that micro USB cables are for charging only.
Secondly, if there are other USB MIDI devices in your system note that Windows has a USB MIDI device limit. Each time you plug a USB MIDI Device into a USB port you're using one of available 10 locations. So even if devices are not plugged in, they're still using those slots. Commonly people use up those slots by accident and no additional USB MIDI Devices can be used. This requires that "un-connected USB devices" are removed manually from the Windows device manager.