Trojan.Karus virus has corrupted my computer! I don’t know how it comes into my computer system. It is just a new machine. The Avira just reported this results a few minutes ago. Now I am nervous as I know that is a Trojan horse which can severely corrupt computer system. But Avira can’t completely block and remove this virus, as every time after restarting computer, I found Avira still reports that it is on system. I know Trojan.Karus virus is very stubborn thing and hard to be removed. Unfortunately, I am the best with computer technology. Do you have any suggestion to help me out?

Brief Introduction of Trojan.Karus Virus

Trojan.Karus virus is stubborn and harmful Trojan horse to severely attack Windows computer. This malicious virus will enter the crucial system areas like registry editor, start-up items, program files folder or windows folder and implants its malicious files to change or disable normal system file. This will make computer run improperly. Error codes will often happen and show on black frozen screen when you first boot up computer. That is because the virus change corrupt and change some files in start-up items. When problems become worse, computer will not start up. Since this Trojan.Karus virus gets on computer and create disaster to computer performance, you will find many computer problems happen. Some strange .exe files show on the desktop and can’t be simply deleted.  Many programs and files are corrupted by the Trojan.Karus virus. This virus changes the DNS settings to block you to access the Internet. And you’re not allowed to downloaded new programs normally, because it doesn’t allow new antivirus to interrupt its actions. Computer runs slower and slower. When you open some programs at the same time, the computer will get frozen and can’t go ahead. Trojan.Karus virus will worsen and weaken computer security. You’re advised to remove this virus timely.

Trojan.Karus virus usually is distributed on the Internet and different websites. Cyber criminals first design different websites that they control, and then they put the virus into those websites. When people visit those unsafe websites and click on anything popping up on the website, the virus will soon activate and install automatically into system. The main trait of those unsafe websites is that there are so many attractive pop-ups showing on. If you accidentally open those sites, please close down it as soon as possible. Trojan.Karus virus also can be bundled into those software for downloading for free. When people download the program they need, the virus also soon gets installed into system. You should choose customized installation to download the program you need. Besides, the spam email is the place for this Trojan.Karus virus to hide. Cyber criminals will send those spam email with virus attachment to people’s email. The email will say that you won a big prize and attract you to click next step. Please don’t be a fool to trust this kind of big and unbelievable surprise. Anyway, please be cautious to what you perform online.

Some Traits about Trojan.Karus Virus

-Can slow down the performance of the computer, or even blue screen.

-Can create many junk files which occupy a lot of space in hard drive.

-Can download other malicious programs into computer, which make further damage.

-Can redirect you to pages you don’t want all the time no matter what you are doing.

-Take a long time to turn on or shut down your computer

-Your sensitive information can be stolen by hacker who can access to your computer with the help of this Trojan.

-May pretend as an anti-virus program and cheat you that computer is in dangerous, and ask you to pay to remove the threats.

Warm prompt: It’s complicated for people who are not computer savvy or not familiar with the virus to remove the Trojan.Karus virus. You can contact YooCare/YooSecurity PC professional online service for help:

Removal Guide for PCs with Windows OS

There is a removal guide of Trojan provided here; however, expertise is required during the process of removal, please make sure you are capable to do it by yourself.

>>>>>> Press Ctrl+Shift+Esc keys simultaneously to get the Task Manager to stop the active processes of Trojan.Karus virus. To do this, you will need to click the “Processes” tag at the top then find out suspicious processes and right click on them and select “End Process”.

Task manager


>>>>>> Click “Start” menu at the lower left corner and type “regedit” in the search programs and files box and press Enter key. Then you will open the “Registry Editor”.

start menu


>>>>>> You will need to find out the suspicious registry files related to this Trojan.Karus virus in the Registry Editor, They are usually located in: HKEY_LOCAL_MACHINE > SOFTWARE. You need to distinguish them from their “Name” and “Data” at the right column. All of them will be randomly distributed. If you are not good at this, ask for an expert for help.

registry editor

>>>>>> After you find out the suspicious registry files, you need to find out where the .exe files of the Trojan.Karus virus locates. Usually, they will be in the operating system drive. To open it, you will need to click Start menu > Computer & My computer. Generally speaking, the Operating System drive is Local Disk (C:).

Hard diskdrives

>>>>>> Basically speaking, all the related files of Trojan.Karus virus will be located in Windows > System32. Find out all the files of the Trojan virus and delete them. Make sure that all the files you deleted are viruses, but not the files of the operating system. Any mistakes will cause data loss even system crash.

System 32

Video of Key Steps on How to Modify or Change Windows Registry:


Trojan.Karus virus can severely attack your computer once it gets on your PC. It corrupts your system files, weakens the security level of the infected computer and modifies all your key registry settings as well as disables your firewall because of its root-kit. The CPU usage percentage will become higher than before, which will cause constant blue or black screen death and system freeze. This Trojan.Karus virus helps cyber criminals remotely control the infected PC. So hackers can do anything on your PC and get any information from your computer or by tracking your online history. And users’ personal information like credit card, bank account details, log-in passwords or other financial information could be leaked out. Victims of this Trojan.Karus virus will suffer from financial loss. This Trojan must be removed as fast as possible to avoid further damages if you detect this nasty thing on your computer.

Warm prompt: If you are not computer savvy or not familiar with the virus to remove Trojan.Karus virus. You can contact YooCare/YooSecurity PC professional online service for help:

Published by Tony Shepherd & last updated on April 19, 2016 12:27 pm

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