Board Thread:Questions and Answers/@comment-93.135.74.122-20121213092002/@comment-121.79.199.85-20130114003149

If you are on PC, then this will usually work.

Step 2 - Realise that there are no cheats, only some exploits that you have to find by yourself.

If you are on Xbox, then you must delete any games in the Call of Duty series, sell them off, buy a PC, and retry Steps 1 and 2.