The System Administrator has set policies to prevent this installation.

This message can appear during installation for a variety of reasons, so several potential solutions are available.

You’re not an Administrator on the machine

If this is the case, contact your Systems Administrator to proceed or log on to the machine as an Administrator account before attempting installation.

Installers downloaded from the Internet are blocked

Right-click on the installer, choose Properties and then click the Unblock button.

Anti-virus or anti-malware software is blocking the installation

Try disabling this during the installation.


Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn’t disable your antivirus software. If you have to temporarily disable it to install other software, you should re-enable it as soon as you’re done. If you’re connected to the Internet or a network while your antivirus software is disabled, your computer is vulnerable to attacks.

Security Policy is preventing installation

With some operating systems, you can open the Group Policy Editor to do this (gpedit.msc). If you open this editor, in the left pane you will need to expand Computer Configuration, then Administrative Templates, then Windows Components, and finally you will need to click on Windows Installer. Now in the right pane you will need to double click Disable Windows Installer and change the setting from Enabled to Disabled.

With operating systems that are Home versions the Group Policy Editor is not available which would require you to edit the policy in the Registry. Here are steps for editing the registry:

  1. Open the Registry Editor
    Windows Vista or later
    • Click Start
    • Type REGEDIT in the text box directly above Start and press Enter

    Windows XP

    • Click Start and click Run
    • Type REGEDIT and click OK
  2. Navigate to the following registry key:
    To do this, click the triangle or plus sign next to each item listed until you get toInstaller then click Installer in the left pane to display its values in the right pane
  3. Right click DisableMSI (right pane), choose Modify, and change the value to 0
  4. Close the Registry Editor