Can you please press on the keyboard the windows key + X and click on control panel.
Then click on Uninstall a program
Click on Office, then change, then repair
Choose to do an online repair
Once completed, restart the computer, and check if it is now working correctly.
I can also do these steps for you, and have made a request via Additional Services. This is optional, and if you choose to do this, I can, with your permission, remote into your computer while you watch and do all these steps (and deal with any problems that arise during them) for you. Or if you do not choose to take this service, we can continue here. This is no problem at all. Just let me know please.
Else let me know the results please.