UAC File Virtualization - Windows 7 Service
Virtualizes file write failures to per-user locations.
This service also exists in Windows 10, 11, 8 and Vista.
Startup Type
| Windows 7 edition | without SP | SP1 |
|---|---|---|
| Starter | Automatic | Automatic |
| Home Basic | Automatic | Automatic |
| Home Premium | Automatic | Automatic |
| Professional | Automatic | Automatic |
| Ultimate | Automatic | Automatic |
| Enterprise | Automatic | Automatic |
Default Properties
| Display name: | UAC File Virtualization |
| Service name: | luafv |
| Type: | filesys |
| Path: | %WinDir%\system32\drivers\luafv.sys |
| Error control: | normal |
| Group: | FSFilter Virtualization |
Default Behavior
The UAC File Virtualization service is a file system driver. If the UAC File Virtualization fails to load or initialize, the error is recorded into the Event Log. Windows 7 startup should proceed, but a message box is displayed informing you that the luafv service has failed to start.
Dependencies
UAC File Virtualization will not start, if the FltMgr service is stopped or disabled.
Restore Default Startup Type of UAC File Virtualization
Automated Restore
1. Select your Windows 7 edition and Service Pack, and then click on the Download button below.
2. Save the RestoreUACFileVirtualizationWindows7.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 luafv.sys file exists in the %WinDir%\system32\drivers folder. If this file is missing you can try to restore it from your Windows 7 installation media.