When it comes to computers and electronics, the only dumb question is the question you don't ask!   
I often go out to customers to fix their computers or help them learn how to better use and customize their computers and they either tell me that they feel stupid asking questions or start out asking their questions by saying, "This is a dumb question...".  Many of them won't even ask questions, either because they don't know the terminology or they don't want to appear as if they are lacking in knowledge of computers.  In my experience, the only way you learn, is to ask.  I encourage my customers to ask questions and I try to explain, to the best of my ability, on their level of computer experience, whatever that may be.  If I don't know the answer, I go find the resources to answer the question.  I don't dumb it down, but try to relate to the person using terminolgy that relates to what they know and do every day.  Sometimes, that is tricky, because their business has terminology and processes that I don't understand.  In that case, I use the questions they ask to learn more about their business and it helps both of us to steer their computer experience more to what they want to do, not what some computer person wants them to do or their neighbor or kid suggested.As a result, there is a better computer experience for the end user, and better customer relations for me and my customers.  This attitude of caring and empathy can carry over to any other business as well.  So next time you have a question about your computer, or anything else, ask away, and you may be surprised of the answer.