When trying to start a Microsoft 365 app, you might get this error. Here are some things you can try to fix the problem. We've listed the most common solutions first, so try them in order.
Restart your device
Wait a few minutes, restart your device, sign back in, and restart your app.
Repair Office or Microsoft 365 from the Control Panel
How you get to the repair tool depends on your operating system.
Repair options from the Settings page
Select Start
> Settings
> Apps > Apps & features.Select the More
icon next to the app you want to fix.Select the Advanced options link under the name of the app (some apps don't have this option). On the page that opens, select Repair if it's available. If it isn't available or doesn't fix the problem, select Reset.
Repair options from the Control Panel
- In the search box on the taskbar, type control panel and select Control Panel from the results.
- Select Programs > Programs and Features.
- Right-click the program you want to fix and select Repair, or if that's not available, select Change. Then follow the directions on the screen.
Uninstall and reinstall Office or Microsoft 365
Use the uninstall troubleshooter to uninstall Microsoft 365, Office 2021, Office 2019, or Office 2016 from your Windows PC.
Select the button below to start the uninstall troubleshooter.
Click Open if you get a pop-up window indicating This site is trying to open Get Help.
Follow the prompts on the remaining screens and when prompted, restart your computer.
Select the steps for the version of Office you want to install or reinstall.
Microsoft 365 | Office 2024 | Office 2021 | Office 2019 | Office 2016
Important
- The uninstall troubleshooter currently can't uninstall Office 2024.
- Run the troubleshooter on the same Windows PC with the Microsoft 365 or Office product you want to uninstall.
- You need to be on Windows 10 or higher to run the troubleshooter.
Tip
If the Microsoft 365 uninstall troubleshooter doesn't completely uninstall Microsoft 365 or Office from your PC, you can try to manually uninstall Office.
Having trouble installing Office or Microsoft 365? Use the offline installer
To reinstall Microsoft 365 see Install or reinstall Office on a PC.
The Microsoft 365 offline installer may help bypass potential proxy, firewall, antivirus, or Internet connection issues that might occur during an Microsoft 365 installation.
For steps to install an offline version of Microsoft 365, see Use the Office offline installer and select the correct tab for your version of Office.