Can anyone help me? I found the trojan virus "Backdoor.Beasty" on my computer, but my anti-virus program couldn't help me (they wanted me to delete the file "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{AP042907-B967-10D8-9CBD-2672810A369E]" but that file does NOT exist on my computer!!) Is there another way for me to go with this? I can't fix it or even quarantine it.

Also, does anyone know how I may have contracted this virus? through email, or a download? I just don't want to do it again!!

Thanks for your help.