If you dream of a computer, pay careful attention to the other symbols in your dream.
The computer is saying “put the pieces together to understand the overall meaning.” Also, if you use a computer a lot during your waking life for work or play, your dream could be telling you to get outside more and take a break from the screen.
If you dream of someone hacking into your computer, there is a sense that your privacy is being invaded. You may be overwhelmed and have the feeling that you are at the mercy of another.
Also see “Computer Game”, “Computer Virus” and “Computer Mouse.”