Applies to: Exchange Server 2007 SP1
Topic Last Modified: 2009-07-17

This topic provides information about how to troubleshoot an error message that occurs when you try to install Update Rollup 8 for Microsoft Exchange Server 2007 Service Pack 1 (SP1).

When you try to install Update Rollup 8 on a computer that is running Exchange Server 2007 SP1, you receive the following error message:

Unable to install because a previous Interim Update for Exchange Server 2007 has been installed. Please use Add/Remove Programs to uninstall the Interim Update before running this setup.

This issue occurs when the Execution Policy for Windows PowerShell scripts on the computer that is running Exchange 2007 SP1 is set to Allsigned or Restricted instead of to Remotesigned.


  1. Click Start, click All Programs, click Microsoft Exchange Server 2007, and then click Exchange Management Shell.

  2. At the command prompt, check the Execution Policy by running the following cmdlet:

    Copy Code
  3. If the result displays Allsigned or Restricted, change it to Remotesigned. To do this, run the following cmdlet:

    Copy Code
    set-executionpolicy -executionpolicy Remotesigned
  4. Repeat step 2 to confirm that the Execution Policy is set to Remotesigned.