A family of Microsoft word processing software products for creating web, email, and print documents.
Then all I can suggest are the standard troubleshooting steps.
You may want to review How to Troubleshoot Problems that Occur When You Start Word
https://support.microsoft.com/help/921541/how-t...
Does it happen if you open Word in Safe mode?
https://support.office.com/article/Open-Office-...
Safe mode is not a way to regularly use Word, but it is a valuable diagnostic step. If your problem goes away when you use Safe mode, we can walk you through other steps that may help eliminate the problem. Please write back.
If it works in safe mode, write back.
If it does not work in safe mode, First try Quick Repair (takes 5 - 10 mins) , if that doesn't help then try Online Repair (Takes more than 30 mins but less than 1 hour in general)