If your Microsoft Office has started misbehaving, or if it won’t even open, it’s time to Repair it. Microsoft offers a built-in repair-feature for Office Apps, but you may need help finding it.

These steps should cover Office 365 and 2016, all the way back to Office 2010. Use these repair options before uninstalling/reinstalling, as they’ll probably save you a lot of time!

If you’re on an Apple, sorry — Microsoft didn’t allow for this on macOS. To fix Office, you may have to completely uninstall and then reinstall your Office software.