FltMgr Service Defaults in Windows 10

File System Filter Manager Driver.

Default Settings

Startup type:Boot
Display name:FltMgr
Service name:FltMgr
Service type:filesys
Error control:critical
Group:FSFilter Infrastructure
Path:%SystemRoot%\system32\drivers\fltmgr.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\FltMgr

Default Behavior

FltMgr is a file system driver. In Windows 10 it is starting by the operating system Boot Loader as a part of the driver stack for the boot volume. If FltMgr fails to load or initialize, Windows 10 attempts to record the error details into Event Log and restart the PC, using the Last Known Good configuration. If the Last Known Good configuration cannot be applied or working improperly, Windows 10 startup process halts with a Stop error. If you disable or delete the FltMgr service, Windows 10 won't start.

Dependencies

While FltMgr is stopped, disabled or working incorrectly, the following services do not start:

Restore Default Startup Configuration for FltMgr

1. Select your Windows 10 edition and release, and then click Download.

2. Save the Win10_FltMgr_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The FltMgr service is using the fltmgr.sys file that is located in the %WinDir%\system32\drivers folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 10 installation media.