Windows Vista Services

Windows Defender - Windows Vista Service

Scan your computer for unwanted software, schedule scans, and get the latest unwanted software definitions.

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:Windows Defender
Service name:WinDefend
Path:%WinDir%\System32\svchost.exe -k secsvcs
File:%ProgramFiles%\Windows Defender\mpsvc.dll
Error control:normal
Group:COM Infrastructure
  • SeImpersonatePrivilege
  • SeBackupPrivilege
  • SeRestorePrivilege
  • SeDebugPrivilege
  • SeChangeNotifyPrivilege
  • SeSecurityPrivilege

Default Behavior

The Windows Defender service as LocalSystem and runs in a shared process of svchost.exe. If Windows Defender 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 WinDefend service has failed to start.


Windows Defender will not start, if the Remote Procedure Call (RPC) service is stopped or disabled.

Restore Default Startup Type of Windows Defender

Automated Restore

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

2. Save the RestoreWindowsDefenderWindowsVista.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 mpsvc.dll file exists in the %ProgramFiles%\Windows Defender 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.