Run a full Online Repair of Microsoft Office from Windows Settings; this is more thorough than the Repair Now button in Word’s error message.
Close Word and all other Office applications first.
Windows 11
- Right-click Start and select Installed apps.
- Find Microsoft 365 or Microsoft Office.
- Select the three dots (…) next to it, then Modify.
- Select Online Repair → Repair.
- Follow the prompts, restart the computer if requested, and open Word again.
Windows 10
- Right-click Start and select Apps and Features.
- Select Microsoft 365 or Microsoft Office.
- Select Modify.
- Choose Online Repair → Repair.
- Complete the repair and try Word again.
Online Repair repairs the entire Office installation, even when only Word is affected. If your installation shows an MSI repair window instead, select Repair → Continue.^1^
2. If Word still fails, test Safe Mode
- Press Windows key + R.
- Enter:
winword /safe
- Press Enter.
If Word opens and its title bar says Safe Mode, an add-in may be interfering:
- Select File → Options → Add-Ins.
- At the bottom, select COM Add-ins from the Manage list, then select Go.
- Clear one add-in, select OK, and restart Word normally.
- Repeat until Word starts. Older ABBYY FineReader, PowerWord, and Dragon Naturally Speaking add-ins are known potential conflicts.^2^
If Word does not open in Safe Mode, skip the add-in steps.
3. If Online Repair does not fix it
Use Microsoft’s Office uninstall troubleshooter to remove Office, restart the PC, and reinstall Office. Run the troubleshooter on the affected computer; it requires Windows 10 or later and currently cannot uninstall Office 2024.^3^
Before uninstalling, ensure that the Microsoft account used to purchase or activate Office is available, because it will be needed for reinstallation and activation.
References
- Repair an Office application | Microsoft Support
- I get a "stopped working" error when I start Office applications on my PC | Microsoft Support
- [Windows 10](https://support.microsoft.com/office/lifecycle/something-went-wrong-error-when-you-try-to-start-a-microsoft-365-app)