today i wanted to install 3 addons on my origin, but all the serial keys where already used. i am 100 % sure that i never used them or gave them away to people (i only used the serial to install it from the cd without origin).
Once you register your discs orgin has a copy of your game in download versions with the serial numbers. You have to download origin to play the game
You need to download origin, open origin at desktop and there you will find download verions of the game. Run your mouse over the game and click on the title will take you to your registration code.
