Speaking as a “computer” guy... Best thing you can do is download all the latest drivers, re-install Windows 7 fresh, apply updates, and then apply remaining drivers. That is the BEST way to cleanup a used pc.
The other option as some mentioned is buy a Mac. That’s what PC techs buy when they don’t feel like bringing their work home with them.
On a side note you may be eligible for a free Windows 10 license too. A fresh install of that will clean things up. I don’t know the age of the laptop but that version looks pretty good. Way better then the 8/8.1 or Vista disaster.