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Should You Uninstall Office 2016 Before Installing Microsoft 365?
Question details
The user wants to know if they must completely remove their existing Microsoft Office 2016 software before installing a new Microsoft 365 subscription on the same computer.
- Product
- Microsoft Office 2016 / Microsoft 365
- Device & OS
- not provided
- Scenario
- Upgrading from a perpetual standalone Office 2016 installation to a cloud-based Microsoft 365 desktop application subscription.
- Observed behavior
- Because Office 2016 and Microsoft 365 utilize the same major version architecture, attempting to install them side-by-side or overwriting one with the other causes software conflicts and system errors.
Ensure you have the login credentials for the Microsoft account linked to your new Microsoft 365 subscription, and save any open documents before beginning the uninstallation.
Uninstall Office 2016 and Install Microsoft 365
To prevent software conflicts and ensure all features function properly, completely remove Office 2016 before installing your new Microsoft 365 apps.
Office 2016 and Microsoft 365 desktop applications are separate products but share the same underlying major version files. Running the Microsoft 365 installer directly over an existing Office 2016 setup without a clean uninstallation will usually result in missing features, licensing errors, and system instability.
Log in to your Microsoft account Services page in a web browser to ensure your Microsoft 365 subscription is active and ready to download.
Open the Windows Control Panel, navigate to 'Programs and Features', locate Microsoft Office 2016 in the installed software list, right-click it, and select 'Uninstall'.
Once the uninstallation wizard finishes, restart your computer to clear any residual background processes and registry keys.
Return to your Microsoft account Services page, locate your Microsoft 365 subscription, and click the 'Install' button to download and run the new setup file.
Switch to WPS Office for a Hassle-Free Experience
Skip the complex uninstallation routines and version conflicts. WPS Office is a powerful, lightweight alternative that installs in seconds and provides an all-in-one workspace for your documents.
- 1. Download the Software: Visit the official WPS Office website and download the free installer for your operating system.
- 2. Install in Minutes: Run the downloaded file. The lightweight setup process finishes quickly without requiring complex configurations.
- 3. Open Your Files instantly: Launch WPS Office and directly open your existing Microsoft Office files with perfect formatting preservation.
Frequently Asked Questions
Can I keep Office 2016 and just upgrade the license to Microsoft 365?
No. Although they belong to the same software family, Microsoft 365 uses a different update channel and licensing structure. You cannot simply apply a Microsoft 365 license key to an Office 2016 installation; you must install the specific Microsoft 365 applications.
What happens if I ignore the warning and install Microsoft 365 anyway?
If you force the installation without removing Office 2016, you will likely encounter activation loops, application crashes, missing cloud features, and general system instability because the two software suites will conflict over the same registry paths.
Do I need to back up my Outlook emails before uninstalling?
While uninstalling Office does not normally delete your Outlook data files (.pst or .ost), it is highly recommended to export a backup of your mailbox and contacts to a secure location before beginning the upgrade process.
Is it possible to have both installed on different user accounts on the same PC?
No. Microsoft Office desktop installations apply system-wide. You cannot install Office 2016 on one Windows user profile and Microsoft 365 on another profile on the same computer.
