UAC File Virtualization - Windows 10 Service
Virtualizes file write failures to per-user locations.
This service also exists in Windows 11, 8 and Vista.
Startup Type
| Windows 10 version | Home | Pro | Education | Enterprise |
|---|---|---|---|---|
| 1507 | Automatic | Automatic | Automatic | Automatic |
| 1511 | Automatic | Automatic | Automatic | Automatic |
| 1607 | Automatic | Automatic | Automatic | Automatic |
| 1703 | Automatic | Automatic | Automatic | Automatic |
| 1709 | Automatic | Automatic | Automatic | Automatic |
| 1803 | Automatic | Automatic | Automatic | Automatic |
| 1809 | Automatic | Automatic | Automatic | Automatic |
| 1903 | Automatic | Automatic | Automatic | Automatic |
| 1909 | Automatic | Automatic | Automatic | Automatic |
| 2004 | Automatic | Automatic | Automatic | Automatic |
| 20H2 | Automatic | Automatic | Automatic | Automatic |
| 21H1 | Automatic | Automatic | Automatic | Automatic |
| 21H2 | Automatic | Automatic | Automatic | Automatic |
| 22H2 | Automatic | Automatic | 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 UAC File Virtualization fails to start, the error is logged. Windows 10 startup proceeds, but a message box is displayed informing you that the luafv service has failed to start.
Dependencies
UAC File Virtualization is unable to start, if the FltMgr service is stopped or disabled.
Restore Default Startup Type of UAC File Virtualization
Automated Restore
1. Select your Windows 10 edition and release, and then click on the Download button below.
2. Save the RestoreUACFileVirtualizationWindows10.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 10 installation media.