Versions of PowerShell 1.0 and 2.0 cannot coexist on the same computer. You must remove PowerShell 1.0 before installing DPM. The DPM installation wizard will prompt you to install PowerShell 2.0.

To uninstall PowerShell 1.0 on Windows XP

  1. On the Add Remove Programs window, select Show updates.

  2. In the Currently installed programs and updates list, click Windows PowerShell(TM) 1.0, and then click Remove.

  3. Follow the instructions to remove Windows PowerShell 1.0.

To uninstall PowerShell 1.0 on Windows Server 2003

  1. On the Add Remove Programs window, select Show updates.

  2. In the Currently installed programs and updates list, locate the entry for the Windows Update that installed Windows PowerShell 1.0.

    Windows PowerShell 1.0 was installed by one of the following update packages.

    • Hotfix for Windows Server 2003 (KB926139)

    • Hotfix for Windows Server 2003 (KB926140)

    • Hotfix for Windows Server 2003 (KB926141)

  3. Select the corresponding entry, and then click Remove.

  4. Follow the instructions to remove the update.

To uninstall PowerShell 1.0 on Windows Vista

  1. On the Add Remove Programs window, click View Installed Updates.

  2. In the Uninstall an update list, right-click Windows PowerShell(TM) 1.0 (KB928439), and then follow the instructions to remove the update.

Uninstalling PowerShell 1.0 on Windows Server 2008

On Windows Server 2008 Beta 3 and later Windows PowerShell 1.0 is included in the operating system as an optional component. If you have enabled Windows PowerShell 1.0, you must turn the feature off before you can install PowerShell 2.0 CTP3. Perform the following steps to disable PowerShell 1.0.

To uninstall PowerShell 1.0 on Windows Server 2008

  1. Start Server Manager.

  2. Click the Features node.

  3. Click Remove Features.

  4. In the Select Features list, clear the check box for Windows PowerShell 1.0.

To uninstall PowerShell 1.0 and PowerShell 2.0 on the same computer

  1. Uninstall Windows PowerShell 2.0 using one of the above procedures that corresponds to your operating system.

  2. Check to ensure that the following folders exist:

    <system drive>\windows\system32\windowspowershell\v1.0

    <system drive>windows\syswow64\windowspowershell\v1.0

    If they do exist, transfer ownership for the above folders to the Administrator and then delete/rename these folders.

  3. Check to ensure that the following registry key exists:

    hklm:\software\microsoft\powershell

    If the registry exists, delete it.