With Symantec Endpoint Protection (SEP) 14.x installed, smart card readers fail to work properly due to a driver loading error. The device will work again if unplugged or disabled and re-enabled within the device manager.
When viewing the device in device manager, the following error appears:
This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)
The requested operation was unsuccessful.
A timing conflict between sysfer.dll and svchost prevents the necessary services/drivers from loading.
This issue has been resolved through content. To resolve the issue, update the Application Control Data definitions to 190213022 or later.