If you are running Windows, click the "Start" button. Now look for something that says "Run..." and click on it. Then type "cmd" in the field next to "Open:" and push the enter/return button. I took a quick look at the readme file. You shouldn't attempt to use "RTDS". It is to advanced for you. learn more about computers, or find something else that is similar to "RTDS". If you don't know what the "CMD" is, then you should go on youtube and find some vids on how to use a computer. I am sorry if this hurts your feelings, or makes you mad at me, or even sad.