How to restore TrustedInstaller as Owner of system files in Windows

In order to avoid operating system operating errors Windows, starting with Windows Vista system files are protected WFP (Windows File protection), such that users or applications installed you can not modify these files. WFP protection consists in setting a ACL (Access Control List) That only allows the user TrustedInstaller modify file permissions protected, that any users group Administrators nor system can not make changes to their default. Therefore, users who want to modify the operating system that requires permissions on files protected, Must first take control of those files (take ownership). Since granting permission on file system by changing the owner's makes them become vulnerable against the dangers of hackers and / or VirusIt is recommended that after you finish any operation that requires permissions on those files, Trusted restorationInstallI'm like the owner thereof.

owner-trustedinstaller

How to Restore TrustedInstaller as owner of system files In Windows Sight yes Windows 7*

Careful! Before Restoring TrustedInstaller as the owner of a system file, restore the default permissions / initial thereof (or at least modify permissions for the user that you took control of that file Full Control in Read & Execute).

change-permissions
  • identified file system (Folder, registry, etc.) on which you have granted owner permissions, Right click on it and select Properties
file-properties
  • select tab Security and click on the button Advanced
advanced-security
  • click on the tab Owner of then click on the Edit
file-owner
  • if TrustedInstaller not among the users that can be selected as owner, click on Other users or groups
other-users
  • enter NT SERVICE \ TrustedInstaller in the field below Enter the object name to select then click on Check Names> OK
select-user
  • select TrustedInstaller display of users under Change owner toThen click on Apply si OK
change-owner

And that's it. The system file owner is Trusted againInstaller.

If you have multiple file systems on which you have to take ownership and control over which you have changed the permissions, follow the instructions above for each of them. If you want to chown change a system folder and all files in itBefore chown make sure you checked Replace owner on subcontainers and objects.

Replace-infolders-owner

Note: Not all files are owned default Trusted userInstaller, therefore it is not recommended to set it as the owner of any type of file, otherwise you will not be able to modify those files until after you take back control over them with take ownership.

* Tutorial only valid for Windows Vista, 2003 Server, Windows 7 and Server 2008

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2 thoughts on “How to Restore TrustedInstaller as Owner of system files in Windows"

  1. Thank you, I was looking for TrustedInstaller however I did not find it, I did not know of this NT SERVICE \
    Agradeço;)

    Reply
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