Got a pop up alert of Trojan horse Agent4.ASEF on computer as well as other similar pop ups? Can antivirus not help you remove these pop ups with them coming back constantly? What things should be worried that can be damaged by this infection? Should the antivirus software be replaced or renewed? What is the best solution for this constant pop up security alert?

Trojan horse Agent4.ASEF – How to Remove Trojan Virus

Trojan horse Agent4.ASEF is an infection that’s been detected on computers recently. This Trojan virus, coming from the same group as Trojan horse Agent4.AIJV and Agent4.AQLZ virus, can be very dangerous to systems. Unlike malware or ransomware, a Trojan virus like this can hide itself deep down in the systems and cover its evidence from being seen. Besides from security detections, one may not be able to see this Trojan virus like seeing spyware or browser hijackers which keep popping up all over the computer screens.  This Agent4.ASEF Trojan virus is believed to be mainly targeting at private data on infected computers and helping cyber criminals benefit.

One may not notice the first visit of this Trojan horse Agent4.ASEF virus because it can somehow get itself installed without consent from PC users. Hidden and distributed among malicious web sites and free programs, this Trojan virus can attack PCs from different locations with different systems. By visiting an online hacked web site and downloading freeware which bundles with this Trojan, one can be attacked by this infection even though he/she has antivirus protection on the PC as always. This Agent4.ASEF infection is believed to be able to escape from many antivirus programs.

Once installed, Trojan horse Agent4.ASEF virus can reset some default settings and system structures for its own good. It then can hide its evidence while taking up lots of CPU usage to cause incredible slowness in the computer. Victims of this Trojan infection can barely use the computers to do things because everything seems to be rather slow including the Internet connection. Other than that, there will be security alerts popping up telling you that computer is in bad status. Certain malware or spyware can also be expected if this Trojan virus happens to be associating with one. Among all these consequences, system stability and privacy security are being threatened the most.

Note: To save computer from all the further consequences potential dangers, please contact YooSecurity Online PC Experts to get help on a Trojan horse Agent4.ASEF virus removal if you are not an expert yourself.

A Step-by-step Trojan Manual Removal Guide

To completely remove this Trojan horse Agent4.ASEF virus out of the computer, manual removal is suggested here as other antivirus programs may not help much in the removal either. And because of the changeability of this virus, expertise will be required during the manual process in order to fulfill a complete removal. Steps have been listed in the following to get rid of this Trojan virus:

Step 1: Open Windows Task Manager to end processed related to Trojan horse Agent4.ASEF virus. To do that, press Ctrl+Alt+Del keys at the same time or right click on bottom Task Bar and select Start Task Manager.
Windows Task Manager

Step 2: Open Control Panel from Start menu. Go to Folder Options and under View tab, select Show hidden files and folders and non-select Hide protected operating system files (Recommended) then click OK.
Folder Options

Step 3: Go to Registry Editor. First press Windows+R keys and then type regedit in Run box to search. Delete registry entries associated with this Trojan infection:
Run+Registry Editor

%AllUsersProfile%\Application Data\[tmp]
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System “DisableRegedit”
HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\{rnd}=

Video on How to Modify or Change Windows Registry


Trojan horse Agent4.ASEF virus is from a group of Trojan infection called the Trojan horse Agent4. Other members in this group have also been reported before to attack computers. Computer users find it tough to remove this kind of Trojan infection by antivirus because related security pop ups will come back after it’s stated of being removed. The reason for that may be due to the reset of system structures by this Trojan virus. Besides, it can hide deep down into the system under different locations. Any remaining items could bring this Trojan pop up right back. Other than causing all kinds of slowness in the computer, this Trojan virus can also help cyber criminals collect private information. Privacy security will also be threatened by this Trojan infection.

Note: Computer still runs very slow? Cannot make sure the virus is gone completely? Contact YooSecurity Online PC Experts now to get further assistance on removing this Trojan horse Agent4.ASEF virus off your computer.

Published by Tony Shepherd & last updated on June 24, 2013 2:39 am

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