Whoah..... That was a little confusing there. Try using capitalization and punctuation. And don't worry, no one on here will judge you, and if they do for something that stupid then i am sure Brink would have something to say about it. And don't worry about being young, I'm only 17 (soon anyways) and you would never guess. (I hope)
Anyways.... Your problem. What is a DEP program? It is the windows "security feature" that everyone hates? I looked it up and it looks like it. So, you are trying to use iTunes and Vista is DEPing the program? It blocks it when you open it correct? When does the problem occur? We do need a little more information on the problem, such as: When it occurs, how often, any other programs? That sort of thing.
Ok. So is it the UAC blocking it? Or it is the DEP like this: