When you perform an action on some file it shows an error message like “File Access Denied”, “You need permission to perform this action” or “You require permission from trustedinstaller to make changes to this file”. This happens because the owner of the file is Trustedinstaller. In this case you need to change the owner of the file.
fix require permission from trustinstaller

How to Delete file / folder protected by TrustedInstaller

To fix this issue simply you need to change the ownership of the file or folder. Follow the steps.

Watch this video tutorial on how to fix “You Require permission from TrustedInstaller to make changes to this file”.


  1. Right-click on the file and click on the properties of the file or folder.
  2. Click on security tab on Properties window.
  3. Click on advanced tab to bring up another advanced permission window.
  4. Click on the change button nearby the owner information. A new window will appear.
  5. Type the “users” in the “Enter the object name to select” field and then click on apply and OK. See the below-given screenshot.
  6. Click on another OK. The owner of the file has been changed now. See the screenshot below.

  7. Click on Apply and OK. If you don’t get the above process properly then you can visit its dedicated page on how to change the owner of a file.
    Now, you are the owner of the file but still, you don’t have full control on it until you take over its all the permissions. Let’s see how to do that in the next step.
  8. Again right-click on the file and click on the propertiessecurity tab.
  9. Under the Security tab, click on the Edit button.
    edit file permissions
  10. Then choose your user or “users” (You may select your current user name) and then click on “Full Control” checkbox, all the checkboxes will be selected automatically. Then click on Apply and OK.
    take permissions
  11. Now you have full control of the file and you can easily delete the file as you are the owner of the file with full control permission.
  12. You can do the above process also through command prompt. Follow the following steps.
  13. Open command prompt in ‘run as administrator’ mode.
  14. After that, run the following command in command prompt and press enter button. Replace your file location with yours. See the following GIF animation.
    takeown /f “c:\Program Files\Windows Defender\MsMpEng.exe”

    cmd command

What is TrustedInstaller?

It is part of the Windows resource protection (WRP) technology which is implemented by Microsoft to protect the core windows system files. This system provides protection for the .dll, .exe .ocx and .sys files. They can not be replaced, modified or deleted by any other user even by an administrator. Only Windows Module Installer service (TrustedInstaller.exe) can modify these protected files. But sometimes some experts require to modify them they can do so with the above-mentioned method.

Some people also report this issue related to TrustedInstaller.exe process. Even some people consider it as a virus or malicious process but actually it is a legitimate process of Windows. Here’s some FAQ:


Q: TrustedInstaller.exe is utilizing high resources of the system.

A: Actually it is normal while Windows update is in process. So let it complete the process. But if you are seeing continuous consumption of high resources it can be a sign of malware infection. We recommend scanning your computer with a reputed antivirus.

Q: Can I disable or remove it?

A: Though you can do so, we do not recommend as it is for your PC’s security.  It can affect the Windows updates, Installations and uninstallations.

Q: Is TrustedInstaller a malware?

A: No, it is not a virus, it is part of operating system files. Possibilities are less, but we can deny it if you have not installed any antivirus then viruses can play with it. If you are unable to delete/modify system files, it is normal. But if you are unable to delete/ modify your personal files then it could be an issue.

Please post your experience or any question in the comment section.

12 thoughts on “How to Fix “You Require permission from TrustedInstaller””

  1. Hello When I press change to any kind of permissions in the advanced menu this happens https://gyazo.com/0ec48d422c636d6b95663875c1c37cb8 It’s seriously annoying I don’t have permission on my own device…

    Answers to questions I may be asked from this,
    YES I am the admin account on my pc.
    This IS the ONLY account on the device.
    I’m running Windows 10 Home.

    Thank you for any help.

    1. Thanks for contacting,
      It seems like there is a problem in the PC that you could not received the “select owner or group” window. Anyway, if this did not work for you then you’ll do it through command prommpt. Follow the following steps:

      Step 1: Start the command prompt (run as administrator mode)
      Step 2: After that, run run the following command and press enter button from your keyboard. You can copy and paste it from here. Please see the following gif.
      takeown /f “c:\Program Files\Windows Defender\MsMpEng.exe”
      cmd prompt command

        1. Okay. Could you please double-check the role of your user account, is it administrator or standard? If you are an administrator then try to make a NEW administrator user account and then follow the same procedure to change the ownership. Please report back after applying.
          Check are you admin

          1. Hello again, I did as you suggested and it’s come to the same result new admin still can’t change the permissions on the file, see image attached.
            I’m kinda at a loss as to how an admin account lacks permission to make edits to files in the computer it’s on.

            permissions page

          2. No, if it stated “read & execute” rights for admin, it doesn’t mean that admin doesn’t have the right to change the ownership of a file. The same admin right I have (see the screenshot below), but I can change the ownership of the file. This means the problem is somewhere else.
            my admin permission settings
            As of now, try this: Activate your built-in administrator account and apply the same procedure into it and keep me updated.
            Here’s the guide to activate the built-in administrator account.

    1. It seems like you have changed the owner to “users” successfully but did not grand its permissions to “full control”. To do that, we request you to please follow the step 7 from the above article. Watch this video tutorial to know more about it.
      take permissions

  2. This doesn’t work for me. When I get to step 5 and it looks different on my PC.
    I get a box that says “Select this object type”, From this location”, & “Enter the object name to select.”

    I figured Object type was maybe what I was looking for. So click it and uncheck every box except Users. I thought if I left Users as the only one checked then that would be the one that had permission. I hit okay and then I can’t hit okay again in the original box my only option is to cancel.

    All the other ways of changing it are greyed out and I have no choice.

    1. Don’t get confused. It was easy. Just revert all the changes what you did in this. You just needed to type the “users” in the “Enter the object name to select” field and then click on OK. The file owner will be changed. See the below-given screenshot.
      Change Owner of file
      For detailed information, you could watch this video tutorial on How to change ownership and permissions of a file.

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