If you dreamed that you can not enter the computer, because you do not know the code, warns you against actions that you would bitterly regret in the future. If in a dream you try to find a code for someone else's safe or door, then in real life you have conceived a certain matter that will require you not only to expend energy, but also a great intellectual effort. A dream in which you forgot the code means that you are a very accurate and pedantic person with whom it is nice to have commercial business.