I'm a single user not concerned about external access except for the usual virus and scamming issues which I think I have covered. I've just shifted to a new computer and from XP to 7. I'm confused about about all the different accounts i.e. system, owner, administrator, user groups, users and my name, which is used a couple of ways. The bottom line is; I want to delete as many of them as I can and keep this as simple as I can. Is there something I can read that will sort all this out?