Common Log (CLFS) - Windows 7 Service
General-purpose logging service.
This service also exists in Windows 10, 8 and Vista.
Startup Type
| Windows 7 edition | without SP | SP1 |
|---|---|---|
| Starter | Boot | Boot |
| Home Basic | Boot | Boot |
| Home Premium | Boot | Boot |
| Professional | Boot | Boot |
| Ultimate | Boot | Boot |
| Enterprise | Boot | Boot |
Default Properties
| Display name: | Common Log (CLFS) |
| Service name: | CLFS |
| Type: | kernel |
| Path: | %WinDir%\System32\CLFS.sys |
| Error control: | critical |
| Group: | Filter |
Default Behavior
The Common Log (CLFS) service is a kernel driver. If the Common Log (CLFS) fails to load or initialize, the error is logged and the computer attempts to restart with the LastKnownGood configuration. If the LastKnownGood configuration fails, Windows 7 startup also fails, and the boot process halts with a Stop error. If you disable this service, Windows 7 will fail to start. Do NOT change this service startup configuration if your computer is working.
Restore Default Startup Type of Common Log (CLFS)
Automated Restore
1. Select your Windows 7 edition and Service Pack, and then click on the Download button below.
2. Save the RestoreCommonLogCLFSWindows7.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 CLFS.sys file exists in the %WinDir%\System32 folder. If this file is missing you can try to restore it from your Windows 7 installation media.