Windows 7 Services

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
Error control:normal
Group:FSFilter Virtualization

Default Behavior

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.


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 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.

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.