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Youndoo Browser Virus Removal Instructions (Easy Guide)

Ian Lexner
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Question asked by:

Peter P.

Issue:

My browser became infected with Youndoo virus. How can I remove it?

Hello,

recently my Firefox browser was somehow infected with Youndoo virus... It sends annoying pop up ads and etc.
Any advice on how to remove it?

Appreciate it.

Solved issue
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The Youndoo Virus was first discovered by cyber security experts back in June of 2016. Ever since then, the Youndoo Virus have been steadily evolving to make sure that they survive in the ever improving security measures of modern devices.

Easy Youndoo Virus Removal Guide

The Youndoo Virus is a type of browser hijacker and due to the way it is distributed, it is also classified as a PUA or Potentially Unwanted Application. Its most notable symptom is changes browser settings without the user’s permission that leads to more intrusive symtpoms.

Youndoo Virus Symptoms

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There are several notable symptoms to what a Youndoo Virus infection looks like, we have made a short summary for everyone to look out for.

Unwanted Changes in Browser Settings – The first noticeable symptom of a Youndoo virus infection is that settings in the browsers are changed such as the default homepage, default search engine and more. In most cases, the changes are made to promote their affiliated websites, products or services.

Website Redirection – Whenever a user tries to go to a certain website, they will be redirected to a specific website that does not even connect to the one that they are trying to visit. This is most likely due to a Youndoo Virus infection or other browser hijackers.

Intrusive Pop-Up Ads – If you happen to notice seeing intrusive pop-up ads on whenever you use your internet browser, then most likely you are infected with Youndoo virus.

Intrusive Ads Sample

Evolution of the Youndoo Virus

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Ever since its inception way back in June of 2016, its first significant change was it was able to create Google Chrome Profile. By doing this, it is able to run all of the user’s internet traffic through the fake profile and it is able to transfer some of the original content of the user from their legitimate profile to the fake one. In this way, the user is not able to change the browser’s settings to its original setup. What’s bad about this is that even if the new profile is deleted, it will come right back up whenever the browser is opened once again. In most cases, it is named “user0” and the icon will be grayed out instead of the regular blue color. If you happen to notice these changes, then you should definitely run a full system scan with your preferred anti-virus software.

In February of 2017, the cybercriminals behind the Youndoo Virus has once again updated the symptoms of the threat. It has started to create additional profiles in Firefox and names it “Firefox Default” and is now able to schedule tasks that run on its desired time. It can also download updates and reinstall the virus if the user attempts to remove it.

Youndoo Virus Removal Instructions

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If you want a quick way to remove the Youndoo virus or any other threats, then you should install a reliable anti-virus tool. Using an anti-virus application such as iolo System Mechanic will make the virus removal process faster and more reliable compared to manual removal.

Using an anti-virus application such as iolo System Mechanic, online threats will be automatically detected and removed keeping your computer safe and clean. iolo System Mechanic also automatically updates, repairs and restores missing or corrupted Windows Files.

Manual Virus Removal Steps

Here’s a quick guide below on how you can manually remove PUAs or Potentially Unwanted Applications such as Youndoo.

Remove it from Windows Operating System

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  1. Press down the “Windows” key on your keyboard then press “R”. In the Run command line, type “appwiz.cpl” and then click “OK
Opening Uninstall or Change a Program in Windows 10
  1. In the Add/Remove Programs (Windows XP and 7) or Uninstall or Change a Program (Windows 10), look for all PUAs and you can remove them one by one clicking “Uninstall
Uninstalling a Program in Windows 10

Remove it from Mac Operating System

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Go to your Mac menu bar and then click “Go” and click “Applications

Mac OS Applications
  1. In the list of all installed applications, look for all PUAs and drag them to your trash to remove them

Removing Youndoo Browser Hijacker and Other PUAs from Your Browsers

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Remove it from Safari Browser

  1. Click the “Safari” button on the Safari menu bar and then click on “Preferences
Safari Preferences
  1. Click “Extensions” and then click on all suspicious extensions and then click “Uninstall
Uninstalling Extensions in Safari

Resetting Safari to its Default Settings

  1. Click on the “Safari” button on the menu bar and then click on “Preferences
Resetting Safari
  1. Click “Privacy” and then “Remove All Website Data
Remove All Website Data in Safari

Remove it from Internet Explorer

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  1. Click on the “Gear” icon on the upper right corner and then click “Manage Add-ons
Internet Explorer Add-Ons
  1. Click the “Toolbars and Extensions” under “Add-on Types” and look for all unwanted add-ons and then click on “Disable
Removing Add-ons in Internet Explorer

Resetting Internet Explorer to Default Settings

  1. Click on the “Gear” icon on the upper right corner of Internet Explorer and click “Internet Options”
Internet Explorer Internet Options
  1. Click the “Advanced” tab and click on “Reset”. Next, click the “Reset” and then click “Reset” to confirm
Internet Explorer Advanced Options

Remove it from MS Edge

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  1. Click on the “Three Dots” found on the upper right corner of Edge and click on “Extensions
Microsoft Edge Extensions
  1. Select all the unfamiliar extensions that are installed in Edge and click “Uninstall” and click on “OK” to confirm
Uninstalling Extensions in Edge

Resetting Edge to Default Settings

  1. Click on the “Three Dots” located on the upper right corner of Edge and click “Settings
Microsoft Edge Settings
  1. Click “Reset Settings” and then click on “Restore Settings to their Default Values”. Lastly, click on the “Reset” button to confirm
Resetting Edge

Remove it from Google Chrome

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  1. Open the menu in Chrome by clicking the “Three Dots” located on the right corner and then click on “More Tools” and then click on “Extensions
Extensions in Chrome
  1. Click on all the unfamiliar extensions that are in the list and then click “Remove
Removing Unwanted Extensions

Reset Google Chrome

  1. Open the menu in Chrome by clicking the “Three Dots” located on the right corner and then click on “Settings”
Resetting Google Chrome
  1. Click “Advanced” in settings and click on “Reset and Clean Up”. In the next window, click on “Restore settings to their original defaults” and then click “Reset Settings” to confirm
Resetting Chrome

Remove it from Firefox

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  1. Click the “three bars” on the upper right corner of Firefox and click on “Add-ons
Firefox Add-ons
  1. Click on the “three dots” right next to all unfamiliar add-ons in Firefox and click on “Remove
Removing Extensions in Firefox

How to Reset Firefox to its Default Settings

  1. Click the “Three Bars” to open the menu Mozilla Firefox and click “Help”, lastly on the click “Troubleshooting Information” option
Firefox Troubleshooting Information
  1. Click the “Refresh Firefox” button under “Give Firefox a Tune Up” and then click “Refresh Firefox” again
Resetting Firefox

Importance of Anti-Virus Software

The reliable anti-virus software (such as iolo System Mechanic) that are available today are designed to detect, prevent and remove online threats such as viruses and malware. This is very essential for all users especially in today’s digital age wherein most information whether personal or financial are mostly already available online.

About the author
Ian Lexner photo
Ian Lexner - PC & Mac repair expert
Ian is the editor on BestPCTips.com. He has been involved with PCs since he was a teenager. He has experience in software development, computer hardware, virus removals & other security stuff. Currently, his main job and hobby, at the same time, is to help others to deal with various computer-related issues. Whether it's viruses, spyware, all sorts of errors and "bugs" -- Ian and BestPCTips.com are here to help.

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