batcmd.com Windows 10 Services

Windows Defender Antivirus Mini-Filter Driver - Windows 10 Service

Windows Defender Antivirus On-Access Malware Protection Mini-Filter Driver.

This service also exists in Windows 8.

Startup Type

Windows 10 edition 1507 1511 1607 1703
Home Boot Boot Boot Boot
Pro Boot Boot Boot Boot
Education Boot Boot Boot Boot
Enterprise Boot Boot Boot Boot

Default Properties

Display name:Windows Defender Antivirus Mini-Filter Driver
Service name:WdFilter
Type:filesys
Path:%WinDir%\system32\drivers\WdFilter.sys
Error control:normal
Group:FSFilter Anti-Virus

Default Behavior

The Windows Defender Antivirus Mini-Filter Driver service is a file system driver. If Windows Defender Antivirus Mini-Filter Driver fails to start, the error is logged. Windows 10 startup proceeds, but a message box is displayed informing you that the WdFilter service has failed to start.

Dependencies

Windows Defender Antivirus Mini-Filter Driver is unable to start, if the FltMgr service is stopped or disabled.

If Windows Defender Antivirus Mini-Filter Driver is stopped, the Windows Defender Network Inspection System Driver service fails to start and initialize.

Restore Default Startup Type for Windows Defender Antivirus Mini-Filter Driver

Automated Restore

1. Select your Windows 10 edition and release, and then click on the Download button below.

2. Save the RestoreWindowsDefenderAntivirusMiniFilterDriverWindows10.bat file to any folder on your hard drive.

3. Right-click the downloaded batch file and select Run as administrator.

4. Restart the computer to save changes.

Note. Make sure that the WdFilter.sys file exists in the %WinDir%\system32\drivers folder. If this file is missing you can try to restore it from your Windows 10 installation media.