I recently fixed a computer's friend. Had to install a new system (Win10). Long story short, when I was done she asked me: "hey, where is my Word, Excel, Publisher, etc."
I could install Office again, but the one she had was the 2007, kind of old already, and who knows where I put the product key of that one. I wonder if I can just recommend one of these alternatives. I'm afraid that she is so used to Office that a replacement won't cut it.