Hello there zombie, long time no talk.
Here's the downlow. If you are using a windows computer, it was probably something called autoplay. Simply put, put the CD into the cd drive and then wait for it to do whatever task you permanently assigned it to do, then find the "My Computer" icon and then right mouse click it. Select properties (on the bottom), and then the tab: "Auto Play." Switch the current setting: "Select an option to perform" and change it to "Promt me each time to choose an action."
There you go buddy. Have fun. If you have any other strange computer quirks that you need help on, be sure to ask. I know them all.