Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Try this in order:
- Restart the PC, then try opening Word, Excel, or PowerPoint again.
- Run an Office repair:
- Select Start and open Control Panel.
- Go to Programs > Programs and Features.
- Select the Office product.
- Choose Change.
- Select Quick Repair and then Repair.
If the apps still fail to open, check whether an add-in is causing the problem:
- Start the app in Safe Mode:
- Press Windows key + R.
- Type one of these commands and press Enter:
- winword /safe
- excel /safe
- powerpnt /safe
- If the app opens in Safe Mode:
- Go to File > Options > Add-Ins.
- In Manage, select the app add-ins or COM Add-ins, then select Go.
- Clear one add-in at a time, select OK, and restart the app normally.
- If the app opens normally after disabling one add-in, that add-in is the cause.
If the app does not open in Safe Mode, repair Office again or uninstall and reinstall Office.
If the error specifically says Office is busy or Unable to start Office, wait a few minutes first. If that continues, restart the PC and use the Microsoft uninstall troubleshooter to completely remove Office, then reinstall it. Note: the troubleshooter can’t uninstall Office 2024 and requires Windows 10 or later.
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