I refurbish computers and gift them to anyone who is not in a position to buy. I would securely remove any personal data using DBAN that utilises the DoD 5220.22-M sanitisation standard (you can Google it) and change the operating system (perhaps to Linux). I have several people waiting, from single parents to students.
Older machines considered.
Windows 7, 8 or 10 Computers, Laptops etc, (West Bridgford NG2)