Vosteran Virus

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Vosteran is a web browser app that installs itself in Chrome, Firefox, and other browsers, and starts manipulating their settings and putting ads in the search engine results. Vosteran may be described as a potentially unwanted program of the browser hijacking type that needs to be uninstalled for the safety of your computer.

Vosteran 1024x416

The online advertisements can be a big time-waster, especially when you are bombarded with dozens of them on every web page that you open through your web browser. The various pop-ups, banners and notifications not only cover the actual content of the page you want to see, but sometimes may become very aggressive and may redirect you to pages with untrustworthy and dangerous material if you happen to click on them.

This can normally be avoided if an ad blocker app is installed in your browser, and if you try to keep your distance from websites that are overly aggressive in their ad policy. Yet even then, some advertisements may find their way on your screen. This may mostly happen with the help of intrusive software such as adware and browser hijackers.

Here we are going to speak about one recently reported browser hijacker, named Vosteran,  which seeks to change the key settings of any web browser (including the start tab, the homepage address, the search engine toolbar, etc.) and to convert it into an online advertising tool. If your browser has recently been invaded by Vosteran or McAfee virus popoup, there is little you can do to remove its nagging ads and unauthorized browser changes.

So, what can you do if you want to end the unwanted spam with invasive pop-ups, banner messages and redirect prompts? Well, the best way is to uninstall Vosteran completely from your system. There may be different ways to remove this browser hijacker but we have prepared a detailed removal guide below to help you with the entire process. Another method, especially for people who do not want to manually tinker with the settings of their computer, is to use a professional removal tool like the one we have linked in the guide.

The Vosteran Virus

The primary goal of hijackers like the Vosteran virus is to generate revenue for its developers through paid ad clicks and auto redirects to sponsored sites. Thus, the Vosteran virus is least interested to spy on you like a Trojan or corrupt your computer files like a ransomware cryptovirus.

Instead, the program will do its best to make you click on its promotional links and pop-up advertisements and this is the way it earns revenue – through the popular pay-per-click and pay-per-view remuneration models. Both pay models are based on the number of clicks or page visits that the displayed ads get from the users. Naturally, the more advertisements you click on and the more websites you are redirected to by the hijacker, the more money the people behind it will receive. Of course, that is why these types of ad generating software are overly aggressive and are mostly considered unwanted. However, you should not fully trust any ad, link or a pop-up displayed by programs like Vosteran as some of them may be misleading and may even expose your machine to ransomware or Trojans viruses, which, by the way, often use various web ads to get distributed across the web.


TypeBrowser Hijacker
Detection Tool

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How To Remove Vosteran Virus

To try and remove Vosteran quickly you can try this:

  1. Go to your browser’s settings and select More Tools (or Add-ons, depending on your browser).
  2. Then click on the Extensions tab.
  3. Look for the Vosteran extension (as well as any other unfamiliar ones).
  4. Remove Vosteran by clicking on the Trash Bin icon next to its name.
  5. Confirm and get rid of Vosteran and any other suspicious items.

If this does not work as described please follow our more detailed Vosteran removal guide below.

If you have a Windows virus, continue with the guide below.

If you have a Mac virus, please use our How to remove Ads on Mac guide.

If you have an Android virus, please use our Android Malware Removal guide.

If you have an iPhone virus, please use our iPhone Virus Removal guide


Some of the steps will likely require you to exit the page. Bookmark it for later reference.

Reboot in Safe Mode (use this guide if you don’t know how to do it).



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Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab (the “Details” Tab on Win 8 and 10). Try to determine which processes are dangerous. 


Right click on each of them and select Open File Location. Then scan the files with our free online virus scanner:

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    After you open their folder, end the processes that are infected, then delete their folders. 

    Note: If you are sure something is part of the infection – delete it, even if the scanner doesn’t flag it. No anti-virus program can detect all infections. 


    Hold together the Start Key and R. Type appwiz.cpl –> OK.


    You are now in the Control Panel. Look for suspicious entries. Uninstall it/them.

    Type msconfig in the search field and hit enter. A window will pop-up:


    Startup —> Uncheck entries that have “Unknown” as Manufacturer or otherwise look suspicious.


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    Hold the Start Key and R –  copy + paste the following and click OK:

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

    A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

    hosts_opt (1)

    If there are suspicious IPs below “Localhost” – write to us in the comments.

    Open the start menu and search for Network Connections (On Windows 10 you just write it after clicking the Windows button), press enter.

    1. Right-click on the Network Adapter you are using —> Properties —> Internet Protocol Version 4 (ICP/IP), click  Properties.
    2. The DNS line should be set to Obtain DNS server automatically. If it is not, set it yourself.
    3. Click on Advanced —> the DNS tab. Remove everything here (if there is something) —> OK.

    • After you complete this step, the threat will be gone from your browsers. Finish the next step as well or it may reappear on a system reboot.

    Right click on the browser’s shortcut —> Properties.

    NOTE: We are showing Google Chrome, but you can do this for Firefox and IE (or Edge).


    Properties —–> Shortcut. In Target, remove everything after .exe.

    Browser Hijacker Removal Instructions

    ie9-10_512x512  Remove Vosteran from Internet Explorer:

    Open IE, click  IE GEAR —–> Manage Add-ons.

    pic 3

    Find the threat —> Disable. Go to IE GEAR —–> Internet Options —> change the URL to whatever you use (if hijacked) —> Apply.

    firefox-512 Remove Vosteran from Firefox:

    Open Firefoxclick  mozilla menu  ——-> Add-ons —-> Extensions.

    pic 6

    chrome-logo-transparent-backgroundRemove Vosteran from Chrome:

    Close Chrome. Navigate to:

     C:/Users/!!!!USER NAME!!!!/AppData/Local/Google/Chrome/User Data. There is a Folder called “Default” inside:

    Rename the Folder to Backup Default

    Rename it to Backup Default. Restart Chrome.


    Type Regedit in the windows search field and press Enter.

    Inside, press CTRL and F together and type the threat’s Name. Right click and delete any entries you find with a similar name. If they don’t show up this way, go manually to these directories and delete/uninstall them:

    • HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious.
      HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
      HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random

    If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!


    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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