Found by Defender

The Trojan:Win32/AgentBypass.gen!K is found always by MS Defender
Also known as:
Win-Trojan/Agent.28929 (AhnLab)
Win32/AutoRun.EU (ESET)
Downloader.gen.a (McAfee)
Mal/Behav-119 (Sophos)
I have AVAST Pro with all recent updated which never fined it or any clue for a Trojan
(I run XPP) even not in Boot Scan which takes several hours due to huge HD
Please advice soon

Post the full name and loction of the infection.
Do you have Combofix on your pc

http://aumha.net/viewtopic.php?f=28&t=37893

No I am not using ComboFix on this PC
Defender finds it every day!

If you google Win32/AgentBypass.gen!K, there seem to be lots of people reporting this alert from defender, yet other security programs find nothing.So it could be a false alarm.The best way to find out is to send the suspect file to virustotal for analysis

http://www.virustotal.com/

The name and location of the infected file may shed some light too