FltMgr - Windows 11 Service
File System Filter Manager Driver.
This service also exists in Windows 10, 7, 8, Vista and XP.
Startup Type
| Windows 11 version | Home | Pro | Education | Enterprise |
|---|---|---|---|---|
| 21H2 | Boot | Boot | Boot | Boot |
| 22H2 | Boot | Boot | Boot | Boot |
| 23H2 | Boot | Boot | Boot | Boot |
| 24H2 | Boot | Boot | Boot | Boot |
Default Properties
| Display name: | FltMgr |
| Service name: | FltMgr |
| Type: | filesys |
| Path: | %WinDir%\system32\drivers\fltmgr.sys |
| Error control: | critical |
| Group: | FSFilter Infrastructure |
Default Behavior
The FltMgr service is a file system driver. If FltMgr fails to load or initialize, the error is logged and the computer attempts to restart, using the Last Known Good configuration. If the Last Known Good configuration fails, Windows 11 startup also fails, and the boot process halts with a Stop error. If you disable this service, Windows 11 will fail to start. Do NOT change this service startup configuration if your computer is working.
Dependencies
If FltMgr is stopped, the following services cannot start:
- AppID Driver
- AppvStrm
- AppvVemgr
- AppvVfs
- Brokering File System
- File Information FS MiniFilter
- File System Dependency Minifilter
- FileCrypt
- Filetrace
- Microsoft Defender Antivirus Mini-Filter Driver
- Microsoft Security Events Component Minifilter
- Smartlocker Filter Driver
- Storage QoS Filter Driver
- UAC File Virtualization
- UevAgentDriver
- WIMMount
- Windows Bind Filter Driver
- Windows Cloud Files Filter Driver
- Windows Container Isolation
- Windows Overlay File System Filter Driver
- Wtd
Restore Default Startup Type for FltMgr
Automated Restore
1. Select your Windows 11 edition and release, and then click on the Download button below.
2. Save the RestoreFltMgrWindows11.bat file to any folder on a local drive such as SSD or a hard disk.
3. Right-click the downloaded batch file and select Properties.
4. Check the Unblock checkbox and click OK.
5. Right-click the batch file again and select Run as administrator.
6. Restart the computer to save changes.
Note. Make sure that the fltmgr.sys file exists in the %WinDir%\system32\drivers folder. If this file is missing you can try to restore it from your Windows 11 installation media.