How To Get Rid Of A Trojan Horse Virus That Won’t Go Away

Varun Kashyap 27-08-2009

How To Get Rid Of A Trojan Horse Virus That Won't Go Away viruslogoViruses are ubiquitous and dominant on the Windows platform. No matter how careful you are, there is always a chance that your computer gets infected with a virus that just won’t go away.


If you are facing a similar situation, here are a few steps you can take to make sure you get rid of the trojan horse/virus and most of its ill effects if not all.

Scan thoroughly with the antivirus

Sounds trivial right? Why would you get infected in the first place if your antivirus could detect the virus? Well there can be a few reasons, make sure you get them out of the way. It will save you a lot of trouble:

how do i get rid of the trojan horse virus How To Get Rid Of A Trojan Horse Virus That Won't Go Away extensions
  • Update the antivirus to the latest version, and update the virus signature database.
  • Harden the scan options, check on heuristics, potentially dangerous applications, early warning system or whatever fancy names your antivirus uses. Set the antivirus to scan within archives and choose wisely when you specify items to exclude from the scan or leave everything out for scan.

Now perform a system scan, this way you give your antivirus a better chance to detect newer viruses.

Scan the system in safe mode

Very important to do this once before you get into manually removing the virus and its effects. Sometimes the infected files might be locked by the operating system when working in the normal mode. So to increase your antivirus’ odds to detect and clean the virus, you should restart the computer, boot into safe mode and then perform a thorough scan of your system.


Keep in mind the above mentioned points as well. You can generally boot into safe mode by pressing the F8 key during bootup and choosing the safe mode option.

Use special virus removal tools

how do i get rid of the trojan horse virus

Various antivirus manufacturers offer special tools for removing viruses once your system has been infected. Try McAfee’s Stinger or Microsoft’s Malicious Software removal tool or Kaspersky’s Virus Removal Tools. These are special tools that do a great work of removing certain infections.

So once your antivirus has detected the infection, make sure to Google it, this way you can easily find specialized solutions, removal tools and advice on your situation.


Take things into your own hands

There are times when, due to various reasons, none of the above methods works. Even in such cases everything is not lost, you can still rid your computer of viruses and trojan horses by manually deleting the offending file and attempting to nullify the effects that it caused.

The effects vary from changing mouse/keyboard settings to infecting all files in RAM, to infecting all files using a particular library to corrupting the MBR and so on. Your ability to rollback these effects no doubt depends upon how much of a computer nerd you are, but with Google, various forums and Twitter there is a good chance you can make things work for you without having to make that call to your technician.

Here are some tips that may help you:

how do i get rid of the trojan horse virus


All of these methods will surely help your cause. However, your ability to completely rid your computer of a particular virus would depend on how early you are able to detect it, the type of the virus and the harm it was intended to cause (sounds a lot like cancer, isn’t it?).  Always take regular backups in case something goes wrong while attempting a clean up.

Do you have your very own ‘Get Rid of a Virus Workflow’? We would love to know about it in the comments.

Related topics: Anti-Malware, Trojan Horse.

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  1. Claytonped
    May 31, 2017 at 12:07 am

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  2. 5N1P3R BOY
    December 8, 2009 at 12:42 am

    i recommed to use trend micro internet security i have it and it cleans everything u can do quick scan or full scan witch cleans your whole computer i rate trend micro 10/10 and i recomed to use norton 360 you can do quick scan or full system scan i rate norton 360 9/10

  3. Gerry
    August 31, 2009 at 11:34 pm

    Great tips and useful information in several of the comments as well. I recently spent three hours trying to tackle the "Personal Anti Virus Trojan" which didn't respond to the Avira antivirus program. I found Malwarebytes to be the only thing I could get my hands on that would take care of it. I document the ordeal here <a href=""remove Personal Anti Virus Trojan" if anyone else runs into the problem.

  4. Kevin
    August 31, 2009 at 1:10 pm

    This article is mostly useless. 60% of systems that are comprimised have rootkits. The only way to fix them is by booting on a linux live cd and scanning with Fprot or similar. Stop wating our time with such uninformed ballyhoo. Switch to kubuntu. Thanks

    • NomDeGuerre
      September 18, 2009 at 10:19 am

      If you want to throw around made-up statistics, try this:

      60% of PCs have hardware that is unsupported by linux.
      75% of PC applications do not have a linux equivalent.
      90% of users don't want to do *any* OS configuration, even if it means that they aren't running a secure system.

      If you sincerely think that linux-based systems are the solution for the masses, perhaps you mistook this site for slashdot, in which case, you should go back to your parents' basement.

  5. Richard Steven Hack
    August 31, 2009 at 7:43 am

    Getting rid of common spyware can be done with the suggestions listed. The problem is that 6,000 new malware are created daily and there is no way the antivirus and anti-spyware programs can keep up.

    You have only 2 real options when your AV doesn't work:

    1) Hire a PC support technician who has a clue and has the utilities enabling him to find and identify and remove the offending program using a boot CD running Linux or a bootable version of Windows such as the Ultimate Boot CD For Windows.

    2) Format the hard drive and reinstall everything.

    Your choice.

    I have removed upwards of 900 pieces of spyware from one machine for some of my clients. It can take four to eight hours of work or longer to clean a machine so heavily loaded with spyware that the machine is running slowly or not at all. Even Microsoft techs these days recommends a reformat rather than trying to clean a system. And if you have a rootkit, it's nearly impossible to get rid of it without reformatting.

    But you have to have a backup to do that - and you have to know your backup hasn't been infected as well. Since most viruses don't infect pure "data" files, it's always best to completely separate your data files from your C: drive, so that your backup is less likely to have infected executables on it. Most viruses and spyware don't search additional partitions or drives for files to infect, so unless you downloaded a file with a false extension that masquerades as a data file while actually being an executable, you should be reasonably safe.

    The two main things you can do to prevent spyware:

    1) Don't run Internet Explorer - ANY version, including IE8. Run Firefox which does not run Active X controls.

    2) Do NOT click on ANYTHING you didn't explicitly ask for from a Web site. READ and know what you're doing when on a Web site. Even "legit" Web sites these days can be infected with malware that can be transmitted via Active X or JavaScript to your system merely by visiting the infected page.

    And the fellow who recommended switching to Linux is entirely correct. Linux is virtually unaffected by malware. So is the Mac. If you're not mandated by a corporation - who should be learning that expending their capital making Bill Gates the richest guy in the world is not a productive use of their capital - to have to run Windows, you would be well advised to switch. If necessary, get a nice powerful current machine, run Linux or Mac OS X on it, and if you need Windows, run it in a virtual machine on top of the other OS.

    Windows is insecure and will remain so.

    • hines
      December 11, 2009 at 10:16 am

      what if you haven't clicked on it and its there anyway.

  6. Vượng
    August 29, 2009 at 5:24 am

    Simplify the problem with the classic method by using a frozen program such as Deep Freze. I always be fine with my system for a long time.

  7. Smart Boy
    August 28, 2009 at 1:45 pm

    Useful guide. I'm forwarding this to my a friend of mine right now - as he's having some virus problems himself. This will definately help him try and fix the problem. :)

  8. g
    August 27, 2009 at 10:16 pm

    jbu: obviously you don't work in corporate america. tool.

  9. JBu92
    August 27, 2009 at 9:13 pm

    How to get rid of trojans, malware, spyware, crapware, bloatware, and viruses forever: make the switch to linux

    • Sean
      August 27, 2009 at 9:34 pm

      Wow, thanks for that completely useless and uninformative comment, idiot.

      • deralaand
        August 28, 2009 at 2:10 pm

        I see no mention of the latest Trinity Rescue Kit 3.3 build 334(live CD)which has virus scan and removal capabilities.
        I'm not suggesting switching to Linux...but there are linux based tools that may be able to help.

      • Lau
        October 24, 2009 at 5:32 am

        He's not kidding....Linux (I use Ubuntu) is amazingly easy to use and it's all FREE..get your DOS thinking caps back on for a little bit..but Linux is now just as "point and click" as Windoze because other people put their sweat into it and now you can suck it up...for free!!!!

  10. clavicle44
    August 27, 2009 at 8:59 pm

    I could not get the anti-virus to work on a clients infected computer. So i put the hard drive in mine , the virus jumped over to my hard drive and I ended up formatting both and reinstalling . It was the MS-Antivirus a formidable foe.

  11. Peter
    August 27, 2009 at 8:22 pm

    I just finished working with a system that was so infected it would BSOD on boot. Ended up using the Ultimate Boot CD 4 Windows and scanning and removing the crud from there.
    Once I could get it to boot I used autoruns to see what was loading and removed that too.

  12. Chuck
    August 27, 2009 at 7:56 pm

    Having just completed a wrestling match with the Windows Anti-Virus virus (and losing) is my "dealing with a virus workflow".

    1. Try every option for legitimate, safe, free (or cheap) removal of the virus.
    2. Failing that, reformat the hard drive.

    I'm sure people that create viruses have some justification for living...but the supportive logic escapes me at the present time....

  13. Newer Tools & Help
    August 27, 2009 at 6:10 pm

    Try renaming the EXE files for those tools (e.g. from mbam.exe to deadend.exe), then run them. You'll find that 90% of the time they'll work and remove the infection.

    Separately, HijackThis hasn't been updated in a couple of years and is not equipped to detect some recent infections. Best to go to or and follow their instructions and they also offer live help in the forums.

  14. Dead End
    August 27, 2009 at 4:32 pm

    The problem is lately I've been getting viruses that prevent you from opening Spyware, HijackThis, ComboFix or Malware's Anti-Malware. Even in Safe Mode.

  15. Noah
    August 27, 2009 at 3:32 pm
    Here's what I recommend NOT to do when you have a virus. Getting rid of it is pretty simple, if you don't let it affect major things.