I added 10 keys so up to 10 different people (machines) can use them in case there's a big game. That way you stop sharing the same key with a friend you want to play with, and the error goes away! The original key is replaced, but can be re-obtained by reinstalling the game. So what these thingies do is, they change the game's key on your computer's registry. Contact me on Twitter if you keep encountering the error. Steam or CDs may store the original keys elsewhere. Tested on these games installed by Origin. 'The changes take place by just running one of these files anywhere on your PC.'
CommandAndConquerKeyFix Command & Conquer 'Serial Key Already in Use' Fix
