Trojan.Win32.CP4000 is a new warning message that introduced by a rogue anti-spyware program, which is a form of fake malicious software engineered by Internet hackers. It is a variant of Trojan.Win32 or Trojan.Win32.agent.akk. “Your browser was infected by Trojan.Win32.CP4000″ critical system error message might appears in your screen. (via)