I need to create a user account for my stepson but want to control what he
can do, I understand that a limited account will let you install programmes
and webcams but I need to stop this whilst still allowing him to access the
internet and go into chat rooms. How do I go about customising an account to
stop him from installing programmes etc?

I'm thinking the best option will be to create a guest account which has
limited use but I need to put a password on it.

Can anyone help me with this? I've got a fairly good knowledge of computers
but this is over my head!