Smart card PnP Class Filter Driver (scfilter) Service Defaults in Windows 10

Smart card reader filter driver enabling smart card PnP.

Default Settings

Startup type:Manual
Display name:Smart card PnP Class Filter Driver
Service name:scfilter
Service type:kernel
Error control:normal
Group:PnP Filter
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\scfilter

Default Behavior

Smart card PnP Class Filter Driver is a kernel device driver. In Windows 10 it is starting only if the user, an application or another service starts it. If Smart card PnP Class Filter Driver fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the scfilter service has failed to start due to the error.

Restore Default Startup Configuration of Smart card PnP Class Filter Driver

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config scfilter start= demand

3. Close the command window and restart the computer.

The scfilter service is using the scfilter.sys file that is located in the C:\Windows\System32\DRIVERS directory. If the file is removed or corrupted, read this article to restore its original version from Windows 10 installation media.