If you are so worried about viruses and such you could just give them a piece of paper and a pencil, a calculator, and some stamps. I build computers for friends and family all the time and don't worry about viruses. I use a good anti-virus and teach them best practices for internet. What more can you do? And what about the ones who get interested in computers and want to play around and learn. If you block any access they have to the features of the hardware and software there is no opportunity to grow. Just make sure they realize they take risks when playing around like that. I sometimes have to re-build their systems when they really make a mess of them but that's OK. I don't mind as long as they can get their work done, learn something, and have fun. Good luck.... One more point, the times I've had to deal with computers with bios passwords and administrator accounts buried in tons of security I usually can't help the user. They are out of luck unless the guy who put all that junk on is handy, remembers the passwords, and is willing to make the effort required.