TrustedInstaller.exe is a Windows Module service which is an integral part of Windows Resource Protection (WRP). This restricts access to certain core system files, folders and registry keys that are part of Windows installation. TrustedInstaller is a built-in user account that has all the necessary permission to access files and folders in the Windows.

What is the work of Windows Resource Protection (WRP)?

The WRP protect Windows files with extension .dll, .exe, .oxc and .sys files from being modified or replaced. By default, these files extensions can only be modified or replaced by the Windows Module Installer service, TrustedInstaller. If you change or customize the default TrustedInstaller settings, then you’re putting your system at risk.

Sometimes you need to change the ownership of the file to modify or replace system files. Still, once you are done with the customization, there is no option to give back the permission to TrustedInstaller, and sometimes this may lead to the system being unstable as it no longer can protect the system core files. This guide will show you how to restore TrustedInstaller as File Owner in Windows with the below-listed steps.

Restore TrustedInstaller as File Owner in Windows 10

Make sure to  create a restore point  just in case something goes wrong.

1. Right-click on the file, folder or Registry Key to restore the ownership to default TruestedInstaller and then click Properties.

2. Now switch to the security tab and then click the Advanced button near the bottom.

3. On the Advanced Security Settings page click Change under the Owner.

4. Next, type “NT Service\TrustedInstaller” (without quotes) under Enter the object name to select and click on Check Names then click OK.

5. Make sure to checkmark “Replace owner on the subcontainers and objects” under Owner and again checkmark “Replace all child object permission entries with inheritable permission entries from this object” in the bottom.

6. Click Apply, followed by OK.

Now if you have granted Full Control to your user account then you also need to remove these settings as well, follow the below steps to do that:

1. Again right-click on the same file, folder or registry key and select Properties.

2. Switch to Security tab and click the Advanced button near the bottom.

3. Now on the Advanced Security Settings page select (highlight) your account under Permissions entries list.

4. Click Remove and then click Apply followed by OK.


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That’s it you have successfully learned How to Restore TrustedInstaller as File Owner in Windows 10 if you still have any queries regarding this post feel free to ask them in the comment’s section.