An integrated threat protection solution designed to detect, investigate, and respond to cyber threats across Microsoft 365 services.
Run an Online Repair of Microsoft Office from Windows Settings; it is more thorough than the Repair Now option displayed in Word’s error message.
Repair Microsoft Office
Close all Office applications, then use the steps for your Windows version:
Windows 11
- Right-click Start and select Installed apps.
- Find Microsoft 365 or Microsoft Office.
- Select the three dots beside it, then select Modify.
- Select Online Repair → Repair.
- Complete the prompts, restart the PC if requested, and open Word again.
Windows 10
- Right-click Start and select Apps and Features.
- Select Microsoft 365 or Microsoft Office.
- Select Modify.
- Select Online Repair → Repair.
- Complete the prompts, restart the PC if requested, and test Word.
This repairs the entire Office suite, even when only Word is affected. If the installation is MSI-based and Online Repair is not offered, select Repair → Continue instead.^1^
If Word still does not open
Test whether an add-in is preventing startup:
- Press Windows key + R.
- Enter:
winword /safe
- Select OK.
- If Word opens and its title bar shows Safe Mode, go to File → Options → Add-Ins.
- At the bottom, select COM Add-ins under Manage, then select Go.
- Clear one add-in, select OK, and restart Word normally.
- Repeat until the problematic add-in is identified. Older add-ins such as ABBYY FineReader and Dragon Naturally Speaking are documented examples that can cause startup problems.^2^
If Word does not start in Safe Mode, add-ins are unlikely to be the issue; proceed to reinstallation.
Reinstall only if Online Repair fails
- Ensure that the Microsoft account used to purchase or activate Office is available.
- Run Microsoft’s Office uninstall troubleshooter on the affected PC.
- Follow its prompts and restart when requested.
- Reinstall the appropriate Microsoft 365 or Office version.
The uninstall troubleshooter requires Windows 10 or later and currently cannot uninstall Office 2024.^3^
References