If that is really the only thing they use I would just install Linux mint on it in the long run it's probably better for them. It's surprisingly easy to instal

If that is really the only thing they use I would just install Linux mint on it in the long run it's probably better for them. It's surprisingly easy to install mallware and viruses on a windows computer cumputer these days see download.com for a good example. Even I've done it a few times by accident luckily it was in a VM so I just scrapped it. There's basically no difference if all you do is browse the internet and if they run into issued doing something and the only way to do it requires a command line then revert it. These days most basic things can be done very easily in linux without ever touching the command line so the only barrier to entry is that computers don't come pre-loaded with it.