Smart card PnP Class Filter Driver (scfilter) Service Defaults in Windows 8

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
Path:%SystemRoot%\System32\DRIVERS\scfilter.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\scfilter

Default Behavior

The Smart card PnP Class Filter Driver service is a kernel device driver. In Windows 8 it will not be started until the user starts it. If Smart card PnP Class Filter Driver fails to start, the error details are added to Windows 8 error log. When the operating system startup is complete, the user is being notified that the scfilter service hasn't been started.

Restore Default Startup Configuration for 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 %WinDir%\System32\DRIVERS folder. If the file is corrupted or deleted, you can put it back in there.