batcmd.com Windows Vista Services

Application Layer Gateway Service - Windows Vista Service

Provides support for 3rd party protocol plug-ins for Internet Connection Sharing.

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

Startup Type

Windows Vista edition without SP SP1 SP2
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Default Properties

Display name:Application Layer Gateway Service
Service name:ALG
Type:own
Path:%WinDir%\System32\alg.exe
Error control:normal
Object:NT AUTHORITY\LocalService
Privileges:
  • SeChangeNotifyPrivilege
  • SeCreateGlobalPrivilege
  • SeImpersonatePrivilege

Default Behavior

Application Layer Gateway Service logs on as NT AUTHORITY\LocalService and runs in its own process of alg.exe. It does not share its process with other services. If Application Layer Gateway Service 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 ALG service has failed to start.

Restore Default Startup Type for Application Layer Gateway Service

Automated Restore

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

2. Save the RestoreApplicationLayerGatewayServiceWindowsVista.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 alg.exe file exists in the %WinDir%\System32 folder. If this file is missing you can try to restore it from your Windows Vista installation media.