ActiveX Installer (AxInstSV) Service Defaults in Windows 11

Provides User Account Control validation for the installation of ActiveX controls from the Internet and enables management of ActiveX control installation based on Group Policy settings. This service is started on demand and if disabled the installation of ActiveX controls will behave according to default browser settings.

Default Settings

Startup type: Manual
Display name:ActiveX Installer (AxInstSV)
Service name:AxInstSV
Service type:share
Error control:normal
Object:LocalSystem
Path:%SystemRoot%\system32\svchost.exe -k AxInstSVGroup
File:%SystemRoot%\System32\AxInstSV.dll
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AxInstSV
Privileges:
  • SeAssignPrimaryTokenPrivilege
  • SeIncreaseQuotaPrivilege
  • SeTcbPrivilege
  • SeBackupPrivilege
  • SeRestorePrivilege
  • SeAuditPrivilege
  • SeChangeNotifyPrivilege
  • SeImpersonatePrivilege

Default Behavior

ActiveX Installer (AxInstSV) is a Win32 service. In Windows 11 it starts only if the user, an application or another service starts it. When the ActiveX Installer (AxInstSV) service is started, it logs on as LocalSystem and running in a shared process of svchost.exe. If ActiveX Installer (AxInstSV) fails to start, the failure details will be recorded into Event Log. Then Windows 11 should boot up and notify the user about the AxInstSV service startup failure.

Dependencies

ActiveX Installer (AxInstSV) cannot be started, if the Remote Procedure Call (RPC) service won't start.

Restore Default Startup Configuration of ActiveX Installer (AxInstSV)

Before you begin doing this, make sure that all the services on which ActiveX Installer (AxInstSV) 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 command below, paste it into the command window and press ENTER:

sc config AxInstSV start= demand

3. Close the command window and restart the computer.

The AxInstSV service is using the AxInstSV.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 11 installation media.