Microsoft Defender Antivirus Network Inspection Service - Windows 11 Service
Helps guard against intrusion attempts targeting known and newly discovered vulnerabilities in network protocols.
This service also exists in Windows 10 and 8.
Startup Type
| Windows 11 version | Home | Pro | Education | Enterprise |
|---|---|---|---|---|
| 21H2 | Manual | Manual | Manual | Manual |
| 22H2 | Manual | Manual | Manual | Manual |
| 23H2 | Manual | Manual | Manual | Manual |
| 24H2 | Manual | Manual | Manual | Manual |
Default Properties
| Display name: | Microsoft Defender Antivirus Network Inspection Service |
| Service name: | WdNisSvc |
| Type: | own |
| Path: | %ProgramFiles%\Windows Defender\NisSrv.exe |
| Error control: | normal |
| Object: | NT AUTHORITY\LocalService |
Default Behavior
The Microsoft Defender Antivirus Network Inspection Service is running as NT AUTHORITY\LocalService in its own process of NisSrv.exe. It doesn't share its process with other services. If Microsoft Defender Antivirus Network Inspection Service fails to start, the error is logged. Windows 11 startup proceeds, but a message box is displayed informing you that the WdNisSvc service has failed to start.
Dependencies
Microsoft Defender Antivirus Network Inspection Service is unable to start, if the Microsoft Defender Antivirus Network Inspection System Driver service is stopped or disabled.
Restore Default Startup Type for Microsoft Defender Antivirus Network Inspection Service
Automated Restore
1. Select your Windows 11 edition and release, and then click on the Download button below.
2. Save the RestoreMicrosoftDefenderAntivirusNetworkInspectionServiceWindows11.bat file to any folder on a local drive such as SSD or a hard disk.
3. Right-click the downloaded batch file and select Properties.
4. Check the Unblock checkbox and click OK.
5. Right-click the batch file again and select Run as administrator.
6. Restart the computer to save changes.
Note. Make sure that the NisSrv.exe file exists in the %ProgramFiles%\Windows Defender folder. If this file is missing you can try to restore it from your Windows 11 installation media.