How to remove remove files protected by Trusted Installer

Your PC might not let you dispose of some files or folders and give you an Access Denied message which would say You require permission from Trustedinstaller to make changes to this folder. Even as the administrator of your system, you can see such a message. Windows makes sure that file and folders that are crucial for your system are not wrongly accessed or removed. Therefore the Access Denied error is shown. The core files of your operating system are protected by an NT service. A sort of hidden account of Trustedinstaller is in control of such files that keeps users away from making changes to them or deleting them. But if you are sure of your actions and have to have access to one of those files there is a method to get access to them. Follow these steps to make Trustedinstaller give you the folder:

How to remove remove files protected by TrustedInstaller [Solved]


  1. Whichever file or folder you wish to make changes to or delete, right click on it and select Properties from the context menu.
  2. When the Properties window opens, select Advanced from under Security pane as shown below.

  3. If you have Windows 10, this step will look exactly like this. In the Advanced Security Settings, the Owner will be shown as TrustedInstaller with an option of changing it. Click on Change written in blue.

    If you are using Windows 7, you will need to open the Owner tab in Advanced Security Settings and click the Edit button. On the next window that appears, click on Other users or groups button.

  1. When asked to select user etc, enter your username by which you use your computer and click on Check Names button. The object name will be found out by Windows itself, click OK when done.

  2. If you want the changes to be applies to all the files and subfolders of the original folder tick the box that says Replace owner on subcontainers and objects. Close the window by pressing OK and reopen Properties.

The placement of Replace owner on subcontainers and objects button on Windows 7 is a bit different, as shown in the screenshot.

  1. On properties, select Advanced again. When shown Permission entries, press the Change permissions button.

  2. Hit the Add button next and when the Permission Entry window opens, click on the blue text Select a Principal.  Click on Add. On Permission Entry window, click on Select a principal. A window like the one in step 4 will open again and you will need to repeat that step again.

On the same Permission Entry window after selecting a Principal, mark the box that says Full control under Basic permissions.

Next, tick the box that says Replace all child object permission entries with inheritable permission entries from this object. Press OK button to finish.

If you are using Windows 7, this step will be done a bit differently. In the Permissions tab in Advanced Security Settings, click the button Change Permission. Next, click the Add button and then repeat step 4 for Windows 7 that you saw above. Once done, tick the Full Control box likewise and select OK.

Same as Windows 10, tick the box that says Replace all child object permissions with inheritable permissions from this object and hit OK to go.

After this procedure, you will be able to make changes to or delete that folder you could not make changes to or delete before without the Access Denied error showing up.

Other files owned by Trustedinstaller can be made available to you too following this procedure but you should be fully aware of the results of the changes you make to Windows core files and folders so as to avoid any problems or damage to your PC.

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