Can't open certain files

First, i'm a new user to Vista on a new Dell laptop. I created a user
account when i started Vista. When i open user accts I seem my user and it
says Administrator and Password protected under the user name. When i select
Change your account type, it shows me as be a standard user.

I can't open some folders such as Local Settings, My Documents, or NetHood.
What's going on?

Where is my Computer Administrator?
--
Michael