Phenotypebest Virus

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*Source of claim SH can remove it.


Phenotypebest is most commonly referred to as a browser hijacker. Phenotypebest can integrate with Chrome, Firefox, Edge and more other popular web browsers.


Once integrated with them, the hijacker will typically begin to spam them with ads in various shapes and sizes. You will find yourself at some point bombarded with banners, in-text links, box messages and popups all throughout your browsing sessions. Also, you browser may start causing page redirects spontaneously and rerouting you to different sites that promote certain products or services. But that’s not all.

In addition to being constantly exposed to various advertising materials, Phenotypebest may also force you to use a specific search engine that it will make your default one. Similarly, it may also impose a new browser homepage. And you won’t be able to override these changes to the browser’s configurations unless you thoroughly remove the browser hijacker that made them.

This, however, isn’t always as easy as it sounds, especially if you’ve never dealt with such software applications in the past.

The reason is that the developers of browser hijackers like Phenotypebest and Head Captcha Live don’t like to include an “Uninstall” option in them. So users are forced to have to locate all the separate components manually and remove them one by one. And if you happen to miss one, that may be enough for the hijacker to be able to reinstall itself on your computer.

Thus, in order to save you the hassle and frustration of having to blindly seek for the hijacker components, we have created a removal guide just below this post. In it we have described the entire process in a comprehensive, step-by-step format that should be easy to follow and implement on your own. We also have a professional removal program available on our site, if you would rather scan your system for any other potentially unwanted programs and remove those along with Phenotypebest.

Is Phenotypebest dangerous?

One of the main concerns that users tend to have when faced with browser hijackers and similar software pieces is whether or not they’re harmful. And the reality of the matter is that Phenotypebest is not some virus or malicious piece of programming that’s designed to steal sensitive data or harm your files.

With that in mind, Phenotypebest is not in and of itself a threat to your PC. However, the real issues lies with the ads and various sponsored content that it exposes users to.

There’s no way to for the developers to keep track of all the websites that the ads link to. And to be honest, we don’t really think they care enough to anyway.

But the bottom line is that there’s a possibility of landing on insecure web locations. And those are places that could be infected with Trojans, ransomware, worms and who knows what other kinds of viruses. So it’s a good idea to try and keep your interactions with Phenotypebest’s ads to a minimum. And given that this hijacker doesn’t really provide you with any value that would compensate for its annoying activities, the best thing you can do for your machine’s safety is to remove Phenotypebest altogether.


TypeBrowser Hijacker
Detection Tool

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*Source of claim SH can remove it.

Remove Phenotypebest Virus

To try and remove Phenotypebest 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 Phenotypebest extension (as well as any other unfamiliar ones).
  4. Remove Phenotypebest by clicking on the Trash Bin icon next to its name.
  5. Confirm and get rid of Phenotypebest and any other suspicious items.

If this does not work as described please follow our more detailed Phenotypebest 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.


    *Source of claim SH can remove it.

    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 Phenotypebest 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 Phenotypebest from Firefox:

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

    pic 6

    chrome-logo-transparent-backgroundRemove Phenotypebest 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


    Violet George

    Violet is an active writer with a passion for all things cyber security. She enjoys helping victims of computer virus infections remove them and successfully deal with the aftermath of the attacks. But most importantly, Violet makes it her priority to spend time educating people on privacy issues and maintaining the safety of their computers. It is her firm belief that by spreading this information, she can empower web users to effectively protect their personal data and their devices from hackers and cybercriminals.

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