Running multiple versions of Microsoft Office on a single Windows PC can be useful for testing compatibility or accessing legacy features. However, it requires careful planning to avoid conflicts. This guide will walk you through the process of installing and managing different Office versions on one machine.
Understand Version Compatibility
Before attempting to install multiple Office versions, it’s crucial to understand which combinations are supported:
- Office 365, Office 2021, 2019, 2016, and 2013 typically cannot coexist on the same PC.
- The exception is when one version is installed via MSI (common for volume-licensed products) and the other through Click-to-Run.
- Older versions (like Office 2010 and earlier) can often be installed alongside newer ones.
Preparation Steps
Step 1: Check your current Office installation. Open any Office app, go to File > Account, and note the version and installation type (Click-to-Run or MSI).
Step 2: Decide which versions you need to install and verify their compatibility based on the information above.
Step 3: Back up your important Office files and settings before proceeding with any new installations.
Installation Process
Step 1: Always install the older version of Office first. For example, if you’re installing Office 2016 and 2019, start with 2016.
Step 2: Download the installer for the older Office version you want to install. If you have a product key, you may need to use the Office Deployment Tool to create a custom installation package.
Step 3: Run the installer and follow the prompts. Choose a custom installation path different from the default to keep versions separate. For example: C:\Program Files\Microsoft Office\Office16 for Office 2016.
Step 4: Once the older version is installed, proceed to install the newer version. Again, use a custom installation path if possible.
Step 5: After installation, open each version of Office to ensure they’re working correctly. You may need to manually associate file types with the desired version.
Troubleshooting Common Issues
Issue 1: “Stop, you should wait to install Office” error
This error occurs when you try to install a suite that includes newer versions of standalone apps you already have. To resolve:
Step 1: Uninstall the standalone applications that conflict with the new suite.
Step 2: Attempt the Office suite installation again.
Issue 2: Bitness mismatch
All Office versions on a single PC must be either all 32-bit or all 64-bit. If you see an error about bitness mismatch:
Step 1: Determine which bitness you want to standardize on (usually 64-bit for modern systems).
Step 2: Uninstall all Office versions that don’t match your chosen bitness.
Step 3: Reinstall the correct bitness versions in order from oldest to newest.
Managing Multiple Versions
Once you have multiple Office versions installed, keep these tips in mind:
- Use version-specific shortcuts to open the desired Office application.
- Set file associations manually in Windows Settings > Apps > Default Apps to control which version opens by default.
- Keep all versions updated to ensure security and stability.
- If you encounter issues with a specific version, use the Office repair tool for that version to fix problems.
Special Considerations
Outlook Limitations: Only one version of Outlook can be installed at a time. If you need multiple Outlook versions, consider using virtualization or separate user profiles.
Remote Desktop Services: Running multiple Office versions on a system with RDS enabled is not officially supported and may lead to unexpected behavior.
License Management: Ensure you have proper licensing for all installed Office versions to comply with Microsoft’s terms of service.
By following these steps and considerations, you can successfully run multiple Office versions on your Windows PC. Remember to test thoroughly after installation to ensure all versions function as expected in your specific setup.