Remove Trojan.Agent/Gen.Backdoor (Trojan backdoor.agent.gen) [Effective Removal Thread]

Trojan.Agent/Gen.Backdoor Symptoms

1. Browser (i.e. Internet Explorer, Firefox, Opera and Chrome) will not load web pages.
2. Installed anti-virus programs no longer loads or runs; the attempt to run security utilities will only lead to runtime error.
3. Icons of certain program disappear from system tray.
4. Other error messages pop up to inform failure and hinder proper running of intended programs/services.
5. Additional infections, Trojan horse particularly, will be detected soon after Trojan.Agent/Gen.Backdoor infection.
6. Windows System Restore is disabled.
7. Attempt to copy and paste, or drag and drop files from memory stick to hard drive is defeated by Trojan.Agent/Gen.Backdoor infection.