FltMgr Service Defaults in Windows 7

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
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\FltMgr

Default Behavior

FltMgr is a file system driver. In Windows 7 it is being loaded by Boot Loader before Kernel initialization. If FltMgr fails to load, Windows 7 attempts to write the error data into Event Log and restart the computer, using the Last Known Good configuration. If the Last Known Good configuration is not valid, Windows 7 startup ends with a Stop error. If you remove or disable the FltMgr service, Windows 7 won't start.


If FltMgr is stopped, the following services cannot start:

Restore Default Startup Configuration of FltMgr

1. Run the Command Prompt as an administrator.

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

sc config FltMgr start= boot
sc start FltMgr

3. Close the command window and restart the computer.

The FltMgr service is using the fltmgr.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 7 installation media.