Windows Vista Services

UAC File Virtualization - Windows Vista Service

Virtualizes file write failures to per-user locations.

This service also exists in Windows 10, 7 and 8.

Startup Type

Windows Vista edition without SP SP1 SP2
Starter Automatic Automatic Automatic
Home Basic Automatic Automatic Automatic
Home Premium Automatic Automatic Automatic
Business Automatic Automatic Automatic
Ultimate Automatic Automatic Automatic

Default Properties

Display name:UAC File Virtualization
Service name:luafv
Error control:normal
Group:FSFilter Virtualization

Default Behavior

UAC File Virtualization is a file system driver. If UAC File Virtualization fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the luafv service has failed to start.


UAC File Virtualization will not start, if the FltMgr service is stopped or disabled.

Restore Default Startup Type for UAC File Virtualization

Automated Restore

1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.

2. Save the RestoreUACFileVirtualizationWindowsVista.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 Vista installation media.

Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.