that's stupid. You don't have to.
Being the only user doesn't give you write access either.
I bet you've Urban Terror and GTK installed under /ProgramFiles. That is the worst thing you can do. If you have them outside that folder, you normally have all write permissions and you avoid a lot of problems
[12:25] <JohnnyEnglish> morning Nounou
[12:25] <JohnnyEnglish> wotcha doing?
[12:25] <Nounou> hello
[12:26] <Nounou> nothing much, i've nothing to do at work so
[12:26] <Nounou> modeling woman
[12:26] <JohnnyEnglish> woo
[12:26] <JohnnyEnglish> real women?
[12:26] <Nounou> realistic yes, on maya