If you use MalwareBytes (anti-malware program), they pushed out a bad update on Saturday, 1/27.
How to resolve / verify you have the fixed update package:
Update package version 1.0.3803 or higher contains the fix.
To resolve, simply reboot your machine. In some cases, a second or even third reboot may be needed.
To verify you have this update, go to Settings -> About -> Update package version: 1.0.3803