Newbi need some help please

AWOL i am a pc Tech and the obvious things for me is not so obvious for the public i work with, sometimes i cant understand why they don't understand things that is second nature to me. So i know why you getting fed up with me asking so much, i don't understand the obvious to you, hence the questions.
I felt today like the ppl that come to me for advice, there is no excuse for my behavior.
I am sorry for shouting at you