A Microsoft forum proposed a few general methods but below is what worked for my Asus X102B:
- First, I ran the hardware and devices troubleshooter by going to my Control Panel
- Clicked on Hardware and Sound, and then searched for troubleshooting in the search box at the top right.
- Hardware and Sound AGAIN (Microsoft knows nothing about simplicity I tell you)
- Finally Hardware and Devices, then clicked Next and followed through the process to fix.