General-purpose logging service.
This service also exists in Windows 10, 7, 8 and Vista.
Windows 11 version | Home | Pro | Education | Enterprise |
---|---|---|---|---|
21H2 | Boot | Boot | Boot | Boot |
22H2 | Boot | Boot | Boot | Boot |
23H2 | Boot | Boot | Boot | Boot |
Display name: | Common Log (CLFS) |
Service name: | CLFS |
Type: | kernel |
Path: | %WinDir%\System32\drivers\CLFS.sys |
Error control: | critical |
Group: | Filter |
The Common Log (CLFS) service is a kernel mode driver. If Common Log (CLFS) 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.
1. Select your Windows 11 edition and release, and then click on the Download button below.
2. Save the RestoreCommonLogCLFSWindows11.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 CLFS.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.