Trojan.Win32.CP4000 is a fake Trojan message that pops up on the infected computer screen. Trojan.Win32.CP4000 used to be a potential threat earlier, but now it is only used to scare users and to goad them into purchasing full version of rogue anti-spyware programs. These messages may be something similar to “Your browser was infected by Trojan.Win32.CP4000. It’s dangerous for your system (critical files can be lost)! Click OK to download the antispyware program to clean your system!”, or “Your browser was hijacked by Trojan.Win32.CP4000?. These messages shouldn’t be trusted and Trojan.Win32.CP4000 is recommended to be removed from your system.