I live in a large extended family. I'm the oldest and retired, then there is Mum and Dad and the family plus computers....
Even though I'm the oldest, and not so bright, I'm ok with computers having had an IT support role about 15 years ago. I think I'm more aware than Mum or Dad/ other family members of problems that get caused by viruses, hacking etc and also by going onto the dark side of the web.
A close family friend, and a nice guy 'Adrian' , who visits fairly frequently, is getting interested in hacking. I believe he is using a Ubuntu partition to do this, which seems to have been done on the computer belonging to Mum's daughter 'Beth'. I also think (but unknown to me) that he has already tried out some software to demonstrate what can simply be done.
Basically, I'm slightly concerned about him changing stuff, or doing stuff, and affecting our security without us all understanding implications of what he's doing.
My impression, is that if I raised this issue, people will look upon the issue as a bit of harmless fun, and a method for him to learn about such stuff. I am not trying to get him in trouble, or pretend I know more than him - because I probably don't - I just want to ensure we are safe. Overcautious perhaps, but I believe I am the only one interested in keeping things safe!
I ensure I look after the family's router, backing up, general issues, and assisting them when needed. I am the only one with the admin password to the router - which is a fairly reasonable/configurable Vigor model.
At the moment Mum or Dad and Beth give out Wifi codes when asked, e.g. to friends who pop round, and rely on Beth for remembering passwords, because essentially they are too busy and are not interested in computers or security issues like remembering passwords. (e.g. It has taken 3 years to get them to change their email passwords to a point whhere they were not hacked every 9 months)
Obviously this is a more 'people problem' than a 'tech problem', and is a delicate situation, but I want to protect the family (including Beth) if possible without anyone realising.
I've backed up everyone's laptops on portable usb drives and them locked away. The Wifi router is still secure. But of course I want to safeguard the 'in-use' computers such as my Windows 10 Pro PC, and the family Windows 7 and Vista laptops from live hacking, and be sure that both PC's and network remains hack proof .
So even if no one in the family is actually interested, I would like to know what steps I should/could quietly take to secure the computers in a way which would make it difficult or impossible for any hacker with acccess to the computer, our local network or Internet to get into them. I guess using typical Linux or other methods 'out there'. I do realise too that nothing is perfect in life or foolproof, or secure, but I would be interested in any advice, guides or websites to help me, or sources of well known and relible software solutions.
I realise too it is a matter of perspective, because whilst I really don't want our computers or network to be accidentally weakened by his modifying the computers using commands, software or settings, I actually wonder whether there would be any 'white' registry hacks or group policy things etc available for me, which might ensure our home computers to remain a no-go area.. How ironic is that!