Ok I'm thinking of having someone upgrade my HD and other stuff on my computer. They want to look at my computer to see how much stuff I would need ( not going to get into that here). What kind of privacy measure should I take. I'm concerned about them reading my passwords to my email accounts and other stuff. I also have other docs and pics that i can't lose or for them to be looked at (work related). I don't want to reformat my HD yet until I get it updated. How would I protect my privacy?