without seeing whats happened and even if this is a legit not cracked game etc...etc..etc...theres no way really to give help...perhaps some
screenshots might help others as i'm off to bed shortly
There is an option with most operating systems to autoplay certain discs. There may have been a time when a disc was inserted and someone
accidentally had it open the files, and set it to do that by default for all other discs.
I believe the way to fix this is to right click on your cd/dvd drive, select properties, then look for an autoplay option.
If you are unable to find that option reply back with what operating system (windows/mac/etc) you are running and i will see if i can find some
detailed directions
Open your control panel
Select "Hardware and Sound"
Select "Autoplay"
Here you can change the defaults for all types of media, for a game disc the one you are looking for will be labeled "Software and Games" Change
that setting to "Install or Run" or "Ask me every time"
I would suggest the "Ask me every time" option, so you have a bit more control over discs that get put i your computer.