I received the error message "The installation failed" during installation

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Cause: This problem occurs when another copy of Microsoft Office is installed.

Solution:    Remove Microsoft Office and its associated files.

1. In the Finder, under Devices, click the hard disk where Microsoft Office for Mac 2011 is installed.

2. Open the Applications folder, and then drag the Microsoft Office 2011 folder to the Trash.

3. Close the Applications folder, open the Library folder, and then drag the following files to the Trash.

   • Internet Plug-Ins/SharePointBrowserPlugin.plugin

   • Internet Plug-Ins/SharePointWebKitPlugin.plugin

   • LaunchDaemons/com.microsoft.office.licensing.helper.plist

   • Preferences/com.microsoft.office.licensing.plist

   • PrivilegedHelperTools/com.microsoft.office.licensing.helper

     Note:  In Snow Leopard, you also have to delete all Office 2011 receipts in /private/var/db/receipts/. (Snow Leopard moved receipts into this hidden directory, only available by "Go to Folder" in the Finder, or from the command terminal.)

4. On the Finder menu, click Empty Trash.

5. Restart your computer.

6. Install Office for Mac again.

   Note: If you experience the same issue, contact Microsoft Customer Support for installation support.