Uninstall & Reinstall Issues

How to Completely Remove Previous Office Files Before Reinstalling Microsoft 365

Algirdas Jasaitis Oct 1, 2026 868 views

Question details

The user is unable to proceed with reinstalling Microsoft 365 because the setup wizard detects leftover components from a previously uninstalled version of Office.

How to Completely Remove Previous Office Files Before Reinstalling Microsoft 365

Product: Microsoft 365
Device & OS: Windows
Scenario: Attempting to install or reinstall Microsoft 365 on a computer that previously had another version of Microsoft Office installed.
Observed behavior: The setup.exe process is blocked, displaying an error message stating that files from another Office version must be removed, even though the programs were already uninstalled from the Control Panel.

Before you start

Ensure you have saved all your ongoing work and closed any open background applications, as the complete removal process will require a system restart to finalize.

Solution 1Recommended

Use the Microsoft Support and Recovery Assistant (Uninstall Tool)

Using the official Microsoft Office uninstall tool is the most reliable method to safely clean up residual files, broken shortcuts, and hidden registry keys blocking your installation.

Standard uninstallation via the Windows Control Panel often leaves behind shared components and licensing files. The Microsoft Support and Recovery Assistant is designed to aggressively target and remove these lingering elements so you can perform a clean installation.

Download the Uninstall Support Tool

Visit the official Microsoft Support website and search for 'Uninstall Office from a PC'. Download the Microsoft Support and Recovery Assistant (SetupProd_OffScrub.exe) linked in the article.

Install and Run the Application

Double-click the downloaded 'SetupProd_OffScrub.exe' file. Click 'Install' on the prompt, and then click 'I agree' to accept the Microsoft terms of service.

Select the Office Version to Remove

In the Uninstall Office products window, check the boxes next to any old versions of Office listed (e.g., Office 2016, Office 2019, or Microsoft 365), and click 'Next'.

Confirm and Restart

Follow the on-screen prompts to confirm the removal. Once the tool finishes, restart your computer when prompted. After the reboot, run your Microsoft 365 'setup.exe' again.

Use the Microsoft Support and Recovery Assistant (Uninstall Tool)

Safe Data Retention: This tool only removes Office application files and system registry entries. It will not delete your personal Word documents, Excel spreadsheets, or Outlook data files.

Solution 2

Manually Remove Leftover Office Folders

If the automated tool fails to clear the installation block, you can manually delete the leftover installation folders from your system drives.

Free Microsoft Office alternative

Tired of Installation Errors? Try WPS Office

If Microsoft 365 installation issues and leftover registry files continue to block your workflow, consider switching to WPS Office. It provides a frustration-free setup, runs flawlessly on any PC, and offers complete compatibility with your existing Office files.

1. Download the Installer: Visit the WPS Office website and download the free, lightweight installer package.
2. Quick Installation: Run the installer. Unlike heavy Office suites, WPS Office installs cleanly in just one click.
3. Open Your Files: Instantly open and continue editing your existing Microsoft Office documents without format changes.

Lightweight setup package that installs in seconds without registry conflictsFully compatible with Microsoft Word, Excel, and PowerPoint (.docx, .xlsx, .pptx) formatsFamiliar tabbed user interface ensures a seamless migration with zero learning curveAll-in-one suite for documents, spreadsheets, presentations, and PDFs

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Frequently Asked Questions

Why does Microsoft 365 setup say older versions are still installed after I uninstalled them?

When you uninstall Office via the Control Panel, certain shared registry keys, background services, or licensing tokens are often left behind. The Microsoft 365 installer detects these lingering registry entries and assumes the old software is still present.

Will using the Office uninstall tool delete my saved documents?

No. The official Microsoft Support and Recovery Assistant only targets program files, system shortcuts, and registry keys associated with the application software. Your personal files, such as .docx and .xlsx documents, are completely unaffected.

Do I need to deactivate my Office license before using the removal tool?

Generally, no. Microsoft 365 manages activations centrally through your online Microsoft account. Uninstalling the software removes the local license token, and your new installation will simply prompt you to sign in again to reactivate.

Can I have both an older version of Office and Microsoft 365 installed?

While it is technically possible in some scenarios, Microsoft heavily advises against it due to file association conflicts and shared component errors. It is best practice to remove all previous versions before installing Microsoft 365.

Installation & Activation