Being infected with backdoor Trojan Win32.InfecDoor is no fun whatsoever. It will invade your system through various means. IRC (Internet Relay Chat) is a popular method of distribution for this pest as well as e-mail. Its Trojan abilities mean that it will enter pretending to be something other than what it really is. These programs will often pretend to be an update and will send alarming information to coerce a user into downloading the attached file.
Remove at Once
To remove Win32.InfecDoor manually, you can start by halting all running processes and then you will need to search for and purge any and all related files. If you are unfamiliar with this process then you should leave removal to a professional. Damage can occur if the process is not done correctly. For fast, professional removal of Win32.InfecDoor, you can try SpyZooka. With SpyZooka you get a free initial scan to determine the level of infection and then immediate removal afterwards. For safe and quick results, use SpyZooka.