TurboTax FAQ
TurboTax FAQ
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Error 1625: "This installation is forbidden by system policy"

Error 1625: This installation is forbidden by system policy occurs when installing or updating TurboTax.

Possible Causes

  • You're not logged in as an administrator.
  • Your Windows Installer system policy prevents you from installing digitally-signed software updates.

Solutions

Log on to your computer with administrative rights, and then install (or update) TurboTax.

If that doesn't work, you will need to enable installation of digitally-signed software updates:

Windows 7, 8 or Vista

  1. Hold down the Windows key and press R to bring up the Run window.
  2. On the Run window, type gpedit.msc, and then click OK.
  3. On the Local Group Policy window, navigate to Local Computer Policy, then Computer Configuration, then Administrative Templates, then Windows Components, and then Windows Installer.
  4. Double-click Prohibit non-administrators from applying vendor-signed updates.
  5. Click Disabled, and then click OK.

Windows XP

  1. Click Start on the Windows taskbar, and then click Run.
  2. On the Run window, type gpedit.msc, and then click OK.
  3. On the Group Policy window, navigate to Local Computer Policy, then Computer Configuration, then Administrative Templates, then Windows Components, and then Windows Installer.
  4. Double-click Prohibit non-administrators from applying vendor signed updates.
  5. Click Disabled, and then click OK.

 


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