Unfortunately, there is no button in Word to reset the program to its default settings. However, you can rename Word's global template to see if that fixes its problems.

How to set Default Paste in Word In Microsoft Word, you can set the default paste option, so whenever you press the Ctrl V key, that is how Word will paste your content on the document.

Select "Programs" and then "Make a file type always open in a specific program." Windows displays a list of all the file extensions it recognizes, together with the default program used to open them.

It’s now time to pick the font you’ll want Microsoft Word to use as a default whenever you open a new document. Tempted as you might be to pick something zany like Wingdings, that’s going to ...