Windows Modules Installer (TrustedInstaller) Service Defaults in Windows 10

Enables installation, modification, and removal of Windows updates and optional components. If this service is disabled, install or uninstall of Windows updates might fail for your computer.

Default Settings

Startup type:Manual
Display name:Windows Modules Installer
Service name:TrustedInstaller
Service type:own
Error control:normal
Group:ProfSvc_Group
Object:localSystem
Path:%SystemRoot%\servicing\TrustedInstaller.exe
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TrustedInstaller

Default Behavior

Windows Modules Installer is a Win32 service. In Windows 10 it is starting only if the user, an application or another service starts it. When the Windows Modules Installer service is started, it is running as localSystem in its own process of TrustedInstaller.exe. If Windows Modules Installer fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the TrustedInstaller service has failed to start due to the error.

Restore Default Startup Configuration for Windows Modules Installer

1. Run the Command Prompt as an administrator.

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

sc config TrustedInstaller start= demand

3. Close the command window and restart the computer.

The TrustedInstaller service is using the TrustedInstaller.exe file that is located in the %WinDir%\servicing folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 10 installation media.