Mekiroki Virus


Mekiroki is a browser hijacking program that modifies the settings of a web browser in order to insert unwanted ads into the browser’s search results. Mekiroki can replace the original homepage, the new tab page, or the default search engine with a different one, without requesting permission.


The Mekiroki virus

Whether it’s the annoying stream of pop-up ads, banners, and box messages which have started to appear on your screen, or the new homepage or search engine app which Mekiroki has imposed on your web browser, we have a solution for you on this page. Our “How to remove” team has prepared a detailed removal guide, suitable for removing Mekiroki from popular web browsers, including Chrome, Firefox, and IE. Just read through the article and follow the steps in the removal guide at the end and you’ll be able to uninstall the unwanted program and remove all of its annoying components.

The Mekiroki Virus

As noted, the Mekiroki virus is a browser hijacker, and one of its most noticeable characteristics is its ability to deliver multiple advertisements during your web browsing sessions. The ads that the Mekiroki virus generates may come in different forms and shapes such as banners, pop-ups, box messages, etc.

You can often see that the advertisements are labeled as “generated by Mekiroki” or “delivered by Mekiroki,” which is a clear indication that they are not generated by the web page you are visiting, but by an add-on to your browser. In fact, programs like Mekiroki and Captcha Source Center often make some changes to the users’ browsers, such as replacing the homepage and changing the default search engine. Often these changes cannot be uninstalled within the settings of the browser, and they are automatically reintroduced regardless of your attempts to remove them. This can be quite annoying , leading many web users to suspect that they are dealing with a virus or malware such as a Trojan Horse or a Ransomware.

However,the browser hijackers may be many things but they aren’t viruses. They cannot damage your device or the information stored on it, which is exactly what separates them from the above-mentioned Trojans and Ransomware infections. However, this is not a reason to lower your guard. The browser hijackers may sometimes indirectly contribute to your exposure to such threats. For instance, this can happen if you accidentally click on a misleading link or a malvertisement. If you’ve ever heard of the term “malvrertisements” before, then you know that you can find them almost anywhere on the web. These are regular advertisements that cyber criminals have secretly infected with a virus that the user would unknowingly install when they click on the given advert. Sadly, there’s no way surefire to tell the difference between a regular ad and a malvertisement. So it’s best to avoid interacting with any of the ads displayed on your screen for the sake of your safety. If the browser hijacker turns out to be a source of unstoppable commercials, or if its constant page-redirects land you on unfamiliar sites witch questionable content, your best option is to completely uninstall it from your system. Besides, doing so will allow you to reset your previous browser settings and have full control over your web browsing sessions which is very important for a safe web browsing experience.


Name Mekiroki
Type  Browser Hijacker
Detection Tool

anti-malware offerOFFER *Read more details in the first ad on this page, EULA, Privacy Policy, and full terms for Free Remover.

Remove Mekiroki Virus

Uninstalling the extensions related to Mekiroki from the web browser is a common method that many users use to quickly remove the browser hijacker from their computers.  Here is how this can be done:

  1. Start with opening the browser that Mekiroki has hijacked.
  2. Find the main menu icon (typically located top right) and click it to open the menu.
  3. Select the More Tools/Add-ons option from the menu.
  4. Next, find the Extensions sub-menu/option and select it. This will allow you to see all the extensions/add-ons that have been installed in the hijacked browser in a list.
  5. Look through the list and, the moment you find an extension/add-on that clearly has a relation to Mekiroki and is most likely responsible for affecting your web browsing experience, click on it and then select the related Remove/Trash Bin button. This action should remove the problematic extension from the browser.
  6. Repeat the action for any questionable extensions/add-ons that you find and.
  7. Once you are done, restart the browser and search the web with it for a while. Ideally, Mekiroki should cause no more disturbance.

If after you use the browser for some time you still start noticing nagging pop-ups, and experience auto-redirects powered by Mekiroki, please use the more elaborate removal instructions in the guide below:


If you want to remove Mekiroki quickly and effectively, it is important to do some preparation. That involves Bookmarking the page with these removal instructions so you can get back to it and complete the guide, and rebooting the computer in Safe Mode in order to run only the most essential Windows processes and drivers.

To avoid any confusion, we recommend that you use the detailed instructions in this link to safely Reboot your computer in Safe Mode Once you complete them, return to this page and proceed with the steps below.



The removal of Mekiroki begins with searching for and stopping the processes that the browser hijacker runs in the background of the system. The easiest way this can be done is by opening the Windows Task Manager (press the CTRL + SHIFT + ESC key combination) and then clicking on the Processes Tab (the “Details” Tab on Win 8 and 10).

Take your time to carefully search the list for processes that are related to Mekiroki and need to be stopped. These could be processes with odd names that consume a significant portion of your system’s resources but this may not always be the case. 

To determine if a given process that grabs your attention is really dangerous or not, it is best to research it online and scan its files with a trusted malware scanner. You can access the process’s files by right-clicking on it and selecting Open File Location


Then run the files found in that location in a professional malware scanning software. For your convenience, below we have included a free online virus scanner that can do the job and save you time:

Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
This scanner is free and will always remain free for our website's users.
This file is not matched with any known malware in the database. You can either do a full real-time scan of the file or skip it to upload a new file. Doing a full scan with 64 antivirus programs can take up to 3-4 minutes per file.
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Drag and Drop File Here To Scan
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Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
    This scanner is based on VirusTotal's API. By submitting data to it, you agree to their Terms of Service and Privacy Policy, and to the sharing of your sample submission with the security community. Please do not submit files with personal information if you do not want them to be shared.

    If the results from the scan show that the files are dangerous, end the process they come from.

    A dangerous process can be ended by selecting it from the Task Manager, right-clicking on it, and selecting the End Process Tree option. It is also important to delete the related dangerous files and their folders from their file location.

    Note: Please keep in mind that ending legitimate processes unrelated to the threat may have a serious impact on the stability and the overall performance of your other applications and your system. 


    The most probable way for Mekiroki to enter your system in the first place is through some bogus software that you have installed recently. That’s why, if you have such software in the system that you suspect could be responsible for the introduction of the browser hijacker on your computer, it is important to find it and uninstall it. Eventually, after you do that, Mekiroki will also be gone for good and won’t be able to reinstall itself when you restart the computer.

    To access the applications that are presently installed on your computer, simply press the Windows logo key and the R key from the keyboard simultaneously. A Run window will open. Type appwiz.cpl in it and press OK:


    Once you see the list of programs on your screen, search for potentially unwanted apps that you have recently installed that led to the appearance of Mekiroki on your computer. If you find any, try to find some details about them online and if you believe they are the source, uninstall them.

    After you are done with that, open System Configurations (type msconfig in the Windows search field and hit enter) and select the Startup tab. There, you need to disable (remove the checkmark) any startup entries that Mekiroki might have added to the list of Startup Items. Once you are done, click OK.



    The Hosts file on your computer may also undergo some changes due to the presence of Mekiroki in the system. To check if the hijacker has added something unusual in it,  press the Windows and R keys together and copy-paste the line below in the Run window that will appear on the screen:

    notepad %windir%/system32/Drivers/etc/hosts

    After you copy the line, press Enter and search the text in the Hosts file for Localhost. If you detect some questionable IPs added under Localhost (see the example image below),  copy them and paste them in the comments section below.  Our “How to remove” team will check the IPs and will tell you if they need to be removed. 

    hosts_opt (1)

    Aside from making changes in the Hosts file, Mekiroki may also make some DNS changes that need to be revoked if you want to fully eliminate the browser hijacker from the computer. For that, type Network Connections in the windows search field and open the result. After that, follow the instructions below:

    • Right-click on the Network Adapter that is in use and select Properties.
    • In Properties, scroll and find Internet Protocol Version 4 (ICP/IP) and select it.
    • Click on the Properties button at the bottom of the window.
    • Select Obtain DNS server automatically and click on the Advanced button that is found bottom right.
    • The Advanced TCP/IP Settings window will open.
    • In the DNS tab click on the Remove button to delete everything that has been added in the text field. 
    • Finally, click on the OK button to confirm the deletions you have made. 




    One of the most annoying things that users have to deal with when infected with Mekiroki is the changes the browser hijacker has made in their browser. In this step, we will explain how to remove these changes and the components that keep messing with the web browsing experience. 

    Important! For optimal results, the instructions below should be applied to all browsers that are presently installed on the computer. 

    • Right-click on the shortcut icon of the hijacked browser and select Properties as shown below: 


    • Next, click on the Shortcut tab
    • In the section called Target, delete everything that has been added after .exe 
    • Once you are done, click OK to apply your changes. 

    Browser Hijacker Removal Instructions

    ie9-10_512x512  Remove Mekiroki from Internet Explorer:

    • Users that have Internet Explorer should click on this icon IE GEAR  and then select Manage Add-ons from the menu.

    pic 3

    • After that, they should Disable any suspicious-looking or potentially unwanted add-ons that may be linked to Mekiroki. 
    • Next, click again on this icon IE GEAR and select Internet Options from the menu.
    • If there are unauthorized changes in the homepage address, users should replace that address with a homepage URL that they trust and Apply the changes.

    firefox-512 Remove Mekiroki from Firefox:

    • Users that have Firefox should go top right and click  mozilla menu .
    • After that select Add-ons and then the Extensions tab from the left.
    • Select Remove for any extensions that look suspicious or seem to be potentially unwanted.  If they don’t want to get removed, click on the Disable button first and then on Remove.

    pic 6

    chrome-logo-transparent-backgroundRemove Mekiroki from Chrome:

    • Quit Google Chrome and manually navigate to the following location:
    • C:/Users/!!!!USER NAME!!!!/AppData/Local/Google/Chrome/User Data. 
    • Find the “Default” folder in the list of folders and change its name to Backup Default.
    • Start the browser again.

    Rename the Folder to Backup Default


    The last place where Mekiroki might have added some entries that need to be deleted is the Registry. To access the Registry and check it for changes, do the following: 

    • Type Regedit in the windows search field (the search bar in the Start menu)
    • Press Enter and open the result to open the Registry Editor window.
    • By pressing together CTRL and F keyboard keys, open a Find window.
    • In the Find window, type the Name of the browser hijacker and click on Find Next.
    • Wait for the function to search the Registry and Delete any results with that name.
    • Repeat the search as many times as needed until no more results are found.

    Next, to ensure that there are no files left behind, manually to the directories below: 

    • HKEY_CURRENT_USER—Software—Random Directory 
    • HKEY_CURRENT_USER—Software—Microsoft—Windows—CurrentVersion—Run—Random
    • HKEY_CURRENT_USER—Software—Microsoft—Internet Explorer—Main—Random

    Delete/uninstall anything that you believe is linked to the browser hijacker and isn’t in place in each of the directories.

    Attention! Deleting/uninstalling system and app entries in the Registry hides a risk for involuntary system corruption and may affect the normal operation of your OS. To avoid that, please research each entry carefully or use professional removal software that can delete dangerous Registry entries without a risk for your system. 


    About the author


    Lidia Howler

    Lidia is a web content creator with years of experience in the cyber-security sector. She helps readers with articles on malware removal and online security. Her strive for simplicity and well-researched information provides users with easy-to-follow It-related tips and step-by-step tutorials.

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