A family of Microsoft word processing software products for creating web, email, and print documents.
1
Press and hold the Ctrl key on your keyboard while you open Word, Word will open in Safe Mode, is Word working correctly using that method?
2
If not, the best first option is to to perform a full repair of your Office installation.
Open the Settings App (gear icon on your Start Menu)
Go to Apps, then scroll down to find Microsoft Office
Select that and choose Modify - Online Repair
That should fix any issues with your Office Installation.
3
If that does not resolve the problem, completely uninstall Office from your PC, restart the PC, then download and reinstall Office from your Microsoft account on this link.