Office 2011 reinstall issues

Follow these steps to resolve Office for Mac 2011 reinstall issues and complete the installation/activation:

1. Quit all Office apps
   • Make sure Word, Excel, PowerPoint, Outlook, and any other Office apps are closed.
2. Remove the existing Office 2011 installation
   • In Finder, select Go > Applications.
   • Drag Microsoft Office 2011 to the Trash.
   • On the Go menu, select Home.
   • Open Library (hold Option while clicking Go if Library is hidden).
   • Open Preferences and drag the Microsoft folder to the Trash.
   • On the Apple menu, click Restart.
3. Completely remove Office 2011 licensing and support files (if the install still won’t complete)
   • In Finder, select Go > Computer, then open Macintosh HD.
   • Open Library > LaunchDaemons and drag com.microsoft.office.licensing.helper.plist to the Trash.
   • Go back to Library > Preferences and drag com.microsoft.office.licensing.plist to the Trash.
   • Go back to Library > PrivilegedHelperTools and drag com.microsoft.office.licensing.helper to the Trash.
   • Go back to Library > Application Support and drag the Microsoft folder to the Trash (note: this may require reinstalling Silverlight if used).
   • Go back to Library > Fonts and drag the Microsoft folder to the Trash.
   • Go back to Library > Receipts and drag any files that begin with "Office2011_" to the Trash (if present).
   • On the Finder menu, select Empty Trash.
   • On the Apple menu, click Restart.
4. Reinstall Office for Mac 2011 from the CD
   • Insert the Office 2011 CD and run the installer again.
   • After installation completes, start an Office app and follow the activation wizard.
5. If activation fails or errors persist
   • Repeat the complete removal steps above and reinstall again.
   • If still prompted for product key issues or repeated activation prompts, follow the guidance to completely remove Office and then reinstall.

These steps reset Office 2011 files, preferences, and licensing components so the installation can complete cleanly.

References:

• Office for Mac update error: "Office <update version> can't be installed on this disk"
• Troubleshoot Office for Mac 2011 issues by completely uninstalling before you reinstall
• Troubleshoot activation errors for Office for Mac 2011
• "Microsoft program cannot be opened because of a problem" error when you start an Office program
• You are repeatedly prompted to enter your product key when you try to start any Office for Mac 2011 application