A family of Microsoft word processing software products for creating web, email, and print documents.
Are you able to open the Word app from its own icon or is there an error popup dialog indicating it needs to be repaired with a 'Repair Now' button?
1
If that is the error you are seeing.
Before performing this process, please log into your Microsoft account on this link (https://account.microsoft.com/services/) and check to ensure your Office licence or Microsoft 365 subscription is listed correctly on your account.
Open the Settings App (gear icon on your Start Menu)
Go to Apps - Installed Apps, then scroll down to find Microsoft Office
Select that and choose Modify - Online Repair
That should fix any issues with your Office Installation.
2
If that is not the error you are seeing, please provide a screenshot of the error you see when you try to open a Word file.