EasyAccount (often abbreviated as EA) is a "game enhancement" utility rather than a malicious hack. It functions by modifying the mpdata file, which stores your multiplayer statistics locally.
Minimize the game and open the EasyAccount.exe from the extracted WinRAR archive.
Return to the game; your profile should now display all unlocks. Compatibility with Modern Clients (CoD4x)
Choose your game version (most common is 1.7) and click "Easy Upgrade" .