Kokotrokot Virus


Kokotrokot is a browser hijacker known for for rerouting user searches to sites full of ads, banners, and pop-ups. When operating in the system, Kokotrokot typically sets a new browser search engine and replaces the homepage with one of its own.

The Kokotrokot virus typically changes the browser’s homepage and the default search engine

The programs from the browser hijacker type are known to be extremely irritating. This is because it can be quite frustrating to deal with them and to remove the changes they have imposed on popular web browsers like Chrome, Safari, Edge, Opera, and Firefox. Moreover, most web users often mistake the browser hijackers for viruses and initially think that they must have been infected with malware from the ranks of Trojans, Ransomware, or Spyware. The reason is, when a program like Kokotrokot becomes part of the system, it typically changes the browser’s homepage and the default search engine without asking for approval and then it starts to initiate auto redirects to various random sites full of online ads, pop-ups, and banners without any specific action from the user’s side.

All of this can naturally raise some concerns and suspicion but, fortunately, we are here to tell you that browser hijackers such as Kokotrokot are not software that can harm your machine in a direct way. In fact, in this article, we will explain exactly what the programs of this type can do and how to safely uninstall them and remove their ads in case they bother you. You will find a detailed removal guide that contains all the steps that you need to take just below, so stay on this page and read on.

The Kokotrokot Virus

The Kokotrokot virus is typically used for the purpose of generating profit for it creators by showing paid advertisements on the screens of web users while the latter surf the web. The Kokotrokot virus basically ensure that the adverts of different services, products, and their related websites are displayed on the monitor during the regular web surfing sessions.

In this sense, programs like Kokotrokot and Captcha Reverse have no destructive code and no criminal intentions and this sets them apart from real viruses such as Trojans and Ransomware. Nevertheless, many security experts identify browser hackers as potentially unwanted and advise web users to uninstall them from their system as soon as possible.

One of the main reasons for that is the fact that most applications of this type, including Kokotrokot, employ some questionable and quite invasive online advertising methods in order to stream more ads and to redirect the users’ searches to paid web links. For instance, not only can they replace the browser’s default search engine or homepage, but, in many cases, such programs can also collect data regarding the users’ web surfing habits through the hijacked browser. Moreover, the hijackers can run their ad-generating and page-redirecting processes in the background of the system and use a significant amount of the power of your computer. As a result, you may start to experience unusual slow-downs in your system and some of your programs may take longer to respond or perform a command. Your web browser may become unresponsive, crash, or frequently redirect you to some predefined web locations which you have never had the intention to visit.

Fortunately, if the browser hijacker is removed, all these annoying activities would cease. That’s why we suggest that you use the instructions below and get rid of Kokotrokot once and for all.


TypeBrowser Hijacker
Detection Tool

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Remove Kokotrokot Virus

If you’re not familiar with browser hijackers, it may be tough for you to uninstall Kokotrokot , but the simple methods listed below should make it easier for you to do so:

  • If your browser has been hijacked, open it and select the main menu icon from the top right corner.
  • Next, choose More Tools (or Add-ons).
  • The next step is to locate and open the Extensions tab to check what extensions are presently installed in the browser.
  • If you find Kokotrokot or other extensions that you find responsible for the browsing disturbance that you have been experiencing, click Remove/Trash Bin next to the extensions that you want to get rid of.
  • Finally, start a new tab and browse for a while to observe how the browser behaves.

If spam pop-ups and nagging ads persist in your browser after removing any extensions you think are hijacker-related, you may need to search for and remove any other components that Kokotrokot may have installed on your system using the comprehensive steps below:


To begin, save this page as a bookmark in your browser, so you won’t accidentally loose the removal instructions. This will also come in handy when you need to go back to the guide after a system restart.

Next, we recommend that you restart your PC in Safe Mode (please click this link for more instructions). Once the system reboots, follow the on-screen instructions to complete the Kokotrokot removal.



This step requires you to identify and end any background processes related to the browser hijacker that are currently active on your PC.

For that, press CTRL+SHIFT+ESC to open the Task Manager, and then select the Processes tab (the “Details” Tab for Windows 8 and 10) to see what’s running.

Open the File Location folder of any process that you can associate with the hijacker by performing a right-click on it.


After that, you can use the free online virus scanner below to scan for hijacker-related code in the files created by that process.

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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Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
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    The scan results will tell you whether you need to end the process and delete the directories that contain hijacker-related files.


    In the third step, open the Control Panel (type it in the search bar of the Start menu) and go to Programs >> Uninstall a Program.

    Next, go through the list of installed programs to see if there are any new ones. Uninstall Kokotrokot if it appears in the list. You should also delete any freshly installed apps that you suspect are infected with the hijacker.

    Once you’ve completed that, go to the bottom-left corner of the screen and click on the Start button. Enter msconfig into the search box and press the Enter key on your keyboard. The System Configuration window should open. Click the Startup tab to check if Kokotrokot has added any entries in the startup items list.


    Remove the tick from the startup items that you think are linked to the browser hijacker, and then click OK to save your changes.


    In this step, we will show you how to check your computer’s Hosts file for any unusual changes, such as new IP addresses, and take action accordingly.

    Use the Windows+R keyboard shortcut and paste the following text into the Run dialog box to speed things up:

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

    After that, click OK and look for Localhost in the Hosts file that appears on the screen. Check the bottom of the page for any strange IP addresses that might have been added there without your knowledge.

    hosts_opt (1)

    Please let us know in the comments below if you see anything unusual, so we can look into it.

    Next, go to Network Connections (by searching for it in the Start menu’s search box) and repeat the instructions below:

    • Select Properties by right-clicking on the network adapter presently in use.
    • Once you’ve done so, go ahead and choose Internet Protocol Version 4 (ICP/IP). Then, click on the Properties button at the bottom.
    • In the new window, select the Obtain DNS server address automatically option and click on Advanced.
    • Go to the DNS tab in the Advanced window and remove everything that’s been added there, then click OK.


    Here’s how to undo any browser modifications that may have been imposed on your browsers. Regardless of how often you use them, all browsers installed on your computer should go through the steps described below.

    Locate and right-click on the shortcut icon of the web browser.

    You will be presented with a pop-up window with several options. Click on Properties.


    In the Properties window choose Shortcut. After that, in Target, remove everything that might have been added after .exe and click “OK” to save the change.

    Browser Hijacker Removal Instructions

    ie9-10_512x512  Remove Kokotrokot  from Internet Explorer:

    Once Internet Explorer is open, click the gear icon in the upper-right corner of the browser window to access Manage Add-ons.

    pic 3

    In the Add-ons window, look for the browser hijacker add-on, and remove it if you see it there.

    Next, choose Internet Options by clicking the gear icon top right a second time. If you see a change in the URL that is written as a home page, make sure you delete it and add an address of your choice. Click “Apply” once you’ve entered the URL you want for your default home page.

    firefox-512 Remove Kokotrokot  from Firefox:

    Click the Firefox menu button in the upper-right corner of the screen to open the Firefox menu. Next, open Extensions from the menu on the left side of the screen. To ensure that your browser will operate normally, remove any extensions you suspect are interfering with it using the “Remove” button located next to each one.

    pic 6

    chrome-logo-transparent-backgroundRemove Kokotrokot  from Chrome:

    For Kokotrokot to be removed from Chrome, you first need to quit it if it is open. Next, from My Computer (Computer) navigate to this location:

     C:/Users/!!!!USER NAME!!!!/AppData/Local/Google/Chrome/User Data. 

    Search for a folder named Default and once you find it, change its name to Backup Default. Then launch Google Chrome and check how it operates now.

    Rename the Folder to Backup Default


    In some cases, browser hijackers may make changes in the registry or add entries that help them stay on the computer for as long as possible and even re-install in case that they have been removed. That’s why, in the last step, we’ll show you how to locate and delete any hijacker-related registry entries from the registry.

    Start with typing Regedit into the Start menu search box and pressing Enter. The Registry Editor window will immediately appear on your screen.

    CTRL+F will open a Find window, which lets you search for the hijacker by typing its name. See if you can locate any matches in the registry, and then delete anything that you discover.

    If you get no results from your search, use the left panel of the Editor to go to the following three locations:

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

    Look in each of the directories listed above for anything with a strange-sounding name. If you discover files or folders connected with Kokotrokot , you must be very cautious while deleting them.

    Attention! If you are unsure whether the strange-looking files and folders discovered in the registry belong to the browser hijacker, leave them in place for the time being. We recommend using either the free online virus scanner or the powerful malware-removal application we’ve provided as an alternative to avoid accidental system harm.


    About the author


    Brandon Skies

    Brandon is a researcher and content creator in the fields of cyber-security and virtual privacy. Years of experience enable him to provide readers with important information and adequate solutions for the latest software and malware problems.

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