A family of Microsoft word processing software products for creating web, email, and print documents.
Run an Online Repair of Microsoft Office from Windows Settings; it is more thorough than the Repair Now button shown in the Word error dialog.
Run Online Repair
Close Word and any other Office applications, then:
Windows 11
- Right-click Start and select Installed apps.
- Find Microsoft 365 or Microsoft Office.
- Select the three dots (…) beside it, then Modify.
- Select Online Repair → Repair.
- Complete 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, then Modify.
- Select Online Repair → Repair.
- Complete the repair and try Word again.
Online Repair repairs the entire Office suite, even if only Word is failing. If the installation presents an MSI-based repair window instead, select Repair and then Continue.^1^
If Word still will not open
Test whether an add-in is causing the startup failure:
- Press Windows key + R.
- Enter:
winword /safe - Select OK.
If Word opens and its title bar says Safe Mode:
- Go to File → Options → Add-Ins.
- At the bottom, set Manage to COM Add-ins, then select Go.
- Clear one add-in, select OK, and restart Word normally.
- Repeat until Word starts successfully. Leave the problematic add-in disabled or install an updated version.
If Word does not open in Safe Mode, the problem is unlikely to be an add-in.^2^
Remaining fallback
If Online Repair does not resolve it:
- Open Settings → Windows Update.
- Select Check for updates and install available updates.
- If Word still fails, uninstall and reinstall Office. Ensure the Microsoft account used for Office is available before uninstalling so the product can be reinstalled and activated. Microsoft’s startup-error guidance recommends reinstalling after repair and add-in testing fail.^2^
References