Trojan.Win32.CP4000 used to be a real malware, now fake anti-spyware software like Files Secure which will display Trojan.Win32.CP4000 as a fake popup message or their scan result to trick user to buy the fake anti-spyware program. The fake anti-spyware program usually get installed onto your PC without your permission, through Trojan, malware and virus (or you could get it by installing a fake video codec). fake anti-spyware will display the Trojan.Win32.CP4000 fake system alerts or fake security alerts to trick user to buy the Paid Version of the fake anti-spyware program.

The possible error messages are either “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″. As discussed previously, these messages are completely misleading. You can safely remove Trojan.Win32.CP4000 by following our manual removal instructions if you are familiar with regedit and dll files. Good luck!

Download SpyHunter* Spyware Detection Utility: http://www.xp-vista.com/spyware-removal/trojanwin32cp4000-removal-instructions

Source: http://www.xp-vista.com/spyware-removal/trojanwin32cp4000-removal-instructions