Windows Defender Firewall (mpssvc) Service Defaults in Windows 10

Windows Defender Firewall helps protect your computer by preventing unauthorized users from gaining access to your computer through the Internet or a network.

Default Settings

Startup type: Automatic
Display name:Windows Defender Firewall
Service name:mpssvc
Service type:share
Error control:normal
Object:NT Authority\LocalService
Path:%SystemRoot%\system32\svchost.exe -k LocalServiceNoNetworkFirewall -p
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mpssvc
  • SeAssignPrimaryTokenPrivilege
  • SeAuditPrivilege
  • SeChangeNotifyPrivilege
  • SeCreateGlobalPrivilege
  • SeImpersonatePrivilege
  • SeIncreaseQuotaPrivilege

Default Behavior

Windows Defender Firewall is a Win32 service. In Windows 10 it is starting automatically when the operating system starts. Then the Windows Defender Firewall service is running as NT Authority\LocalService in a shared process of svchost.exe along with other services. If Windows Defender Firewall fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the mpssvc service has failed to start due to the error.


Windows Defender Firewall cannot be started under any conditions, if the following services are disabled, deleted or working improperly:

Restore Default Startup Configuration of Windows Defender Firewall

Before you begin doing this, make sure that all the services on which Windows Defender Firewall depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt as an administrator.

2. Copy the commands below, paste them into the command window and press ENTER:

sc config mpssvc start= auto
sc start mpssvc

3. Close the command window and restart the computer.

The mpssvc service is using the mpssvc.dll file that is located in the C:\Windows\system32 directory. If the file is removed or corrupted, read this article to restore its original version from Windows 10 installation media.