How to Remove Trojan:JS/Medfos.A Completely

Have no idea of how to remove Trojan:JS/Medfos.A which has infiltrated into your computer system completely? Have tried several antivirus programs but still cannot remove it at last? What is it and how dangerous would it be? Please review this post for more detailed information.

Trojan:JS/Medfos.A Instruction:

Trojan:JS/Medfos.A is detected as a nasty Trojan horse which is similar to Trojan:JS/medfos.B and Trojan.Agent/Gen-Medfos. Most of antivirus programs can detect its existence in the computer but cannot remove it completely. It lurks deep in some malicious websites or links, some “free” software from unsafe resources and spam email attachments. Once visiting those unsafe websites or opening those unknown software and attachments, your computer will get attacked easily. This stubborn Trojan horse hides deep in Win32 system files both in normal mode and safe mode with networking of Windows XP, Windows Vista, Windows 7 and Windows 8.
Trojan:JS/Medfos.A will inject itself to the important system files and then infect .dll files which may generate many critical errors after completing its installation and execution. Since it can consume system resources, your computer will run really slow like a snail which would make you feel very annoyed at working in the infected computer. Moreover, the cyber criminals who designed this Trojan can easily access your system to record your online behaviors and reach your data in the infected computer. What’s worse, this virus is able to implant some other infections into your computer leaving your computer in a dangerous condition. Thus, please remove it without any delay.

Even though some antivirus programs may block the Trojan temporarily, it will pop up again to scare you if it has not been removed completely. Therefore, it needs and only can be removed manually. Please notice that manual removal is complicated and if you haven’t sufficient expertise in dealing with program files, processes, .dll files and registry entries, it may lead to mistakes damaging your system.

The following instructions require certain levels of computer skills. If you’re not sure and are afraid of making any critical mistakes during the process, please live chat with YooCare Expert now.

Manual Removal Guides:

1. Show hidden files

(1). Click on the Start button and then on Control Panel

(2). Click on the Appearance and Personalization link

(3). Click on the Folder Options link

(4). Click on the View tab in the Folder Options window

(5). Choose the Show hidden files, folders, and drives under the Hidden files and folders category

(6). Click OK at the bottom of the Folder Options window.

2. Delete virus files

(1). Delete the related registry entries to this Trojan virus through Registry Edit

Guides to open registry editor: Click “Start” menu, hit “Run”, then type “regedit”, click “OK”

While the Registry Editor is open, search and delete the following registry entries listed below:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\[RANDOM CHARACTERS].exe

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings “CertificateRevocation” =


(2). Find out and remove the associated files of this Trojan virus.


%AllUsersProfile%\Application Data\~

%AllUsersProfile%\Application Data\.dll HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “.exe”

Video Shows You How to Safely Modify Windows Registry Editor:

In summary, Trojan:JS/Medfos.A is a dangerous Trojan virus created by cyber criminals, which is able to damage the infected computer seriously. If you are carelessly when surfing the Internet, your computer may get infected with it. Cyber criminals can monitor your computer using traces in background. It is a serious threat and should be removed as soon as possible once detected.

If you have no idea of how to do that, please contact experts from YooCare Online Tech Support for further help.

Published by on February 28, 2013 4:49 am, last updated on February 28, 2013 4:49 am

Leave a Reply

Problems with your PC, Mac or mobile device?

Live Chat Now

Thanks for using YooCare Services!

Here're some of the support team members who are passionate about their works and support our customers 24/7.

As Seen On