Ads Removal

Yondoo Removal (Chrome)

Parasite may reinstall itself multiple times if you don't delete its core files. We recommend downloading SpyHunter to scan for malicious programs installed with it. This may save you hours and cut down your time to about 15 minutes. 

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More information on SpyHunter, steps to uninstallEULAThreat Assessment Criteria, and Privacy Policy.

This page aims to help you remove Yondoo. These Yondoo removal instructions work for Chrome, Firefox and Internet Explorer, as well as every version of Windows.

Nagging adverts messing with your browser

Have you ever heard about Yondoo? You might not have, but since you’re currently reading this article, there’s a high chance that this intrusive program (or a similar one) has been installed on your computer and is currently messing with your browser. If your online experience is being obstructed by annoying ads, if your browser front page has been changed without your permission or consent, if there’s a slow-down of your PC’s productivity, then you probably have adware in your computer’s system.

But what is adware?

Adware is a type of program/browser add-on that instead of enhancing your browser’s capabilities, it makes it nearly impossible for you to effectively use it. It does that by covering your screen with an endless wall of rage-inducing adverts once you open your browser. They come in all shapes and sizes: pop-ups, banners, box messages and occasional page redirects are all on the list of possible obstructions. 

The whole idea behind those programs is that their developers gain revenue for each click any of the adware’s ads receives. This is called the pay-per-click method and is basically the whole reason why adware programs exist. Yondoo is one of the latest of adware programs; therefore it is most likely to be the one that’s currently residing on your PC. 

Distinction between a PUP and a virus

Due to their intrusive character and stealth installation (we’ll get to that later), adware programs are considered PUP. This stands for potentially unwanted program. Here, we should make it clear that there’s a big difference between a PUP and a virus. Malicious programs like Ransomware or Trojan Horses that are, without a doubt, harmful to your PC fall under the virus category. Yondoo and other adware, on the other hand, are relatively harmless and don’t usually pose as security hazards. However, we need to warn you that despite that Yondoo does not aim to damage your system, it may still trick you into exposing your machine to potential threats. It’s usually the ads that you should be concerned with. Just remember to avoid clicking on them, because sometimes they might redirect you to illegal and potentially dangerous webpages. Again, this happens rarely and also the majority of ads are not fake and do not contain any security hazards. Still, it’s best if you never have to find out for yourself. Therefore, just don’t click on them. Also, if you still somehow get redirected to some suspicious looking website, make sure to close it as quickly as possible without interacting with any of its contents.

Commonly used methods for spreading adware

 In the last paragraph of this article we’ll be focusing on Yondoo’s tendency to get installed on people’s computers via stealth installation. It’s easy to see why such methods are being utilized for this adware’s distribution since no one would actually want to install such a program on their PC.

 Now, there are quite a few different methods used for spreading such intrusive software throughout the internet. In here, we’ll cover the most commonly used ones along with some useful tips on how to avoid them.

  • File-sharing sites – since everyone can upload everything on many of those sites, they’ve become a very useful tool for developers of adware programs via which they can freely spread their unwanted software. If you often download things from lesser known sites, make sure that you have a good anti-malware program on your PC. Yondoo is the least problematic program that you can get by downloading random stuff from the internet.
  • Spam e-mails – probably the most widely spread method for distributing all sorts of intrusive and unwanted (and often harmful) software. Yondoo is no exception, since it often gets sent to your e-mail in the form of an attached file to a spam letter. That’s why you should always double-check the details of newly received e-mail messages before opening them.
  • Program-bundling – This is arguably the method with the highest success rate among the three we’ve mentioned in this article. However, it is a strictly legal method (which makes it pretty easy to implement). When program bundling is being used, the intrusive adware is bundled with another program, which is usually free or cheap. Once you install it, you also get the adware inside your system. To prevent this, all you have to do is go for the advanced settings and not the regular ones when you’re attempting to install new programs. In there, you should be able to see what added installs there are. Uncheck everything that you think may be an adware or another PUP. After doing so, you can continue with the actual installation of the program.

 Below, there is a detailed guide on how to uninstall and remove adware programs, so if such a program is currently in your PC, waste no time and have it removed as soon as possible using our guide.


Name Yondoo
Type  Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms  It’s mostly the intrusive ads, though other symptoms such as PC slow-down or change in your browser’s front page might occur as well.
Distribution Method Fake e-mails, torrent sites and program-bundling are the most common methods.
Detection Tool Yondoo may be difficult to track down. Use SpyHunter – a professional parasite scanner – to make sure you find all files related to the infection.

Keep in mind, SpyHunter’s malware detection tool is free. To remove the infection, you’ll need to purchase the full version.
More information about SpyHunter and steps to uninstall.


Yondoo Removal

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

This was the first preparation.


To remove parasite on your own, you may have to meddle with system files and registries. If you were to do this, you need to be extremely careful, because you may damage your system.

If you want to avoid the risk, we recommend downloading SpyHunter
a professional malware removal tool.

More information on SpyHunter, steps to uninstallEULAThreat Assessment Criteria, and Privacy Policy.

Reveal All Hidden Files and Folders.

  • Do not skip this  – Yondoo may have hidden some of its files.

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.

  • Remember this step – if you have reason to believe a bigger threat (like ransomware) is on your PC, check everything here.


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.



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.

ie9-10_512x512  Remove Yondoo 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 Yondoo from Firefox:

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

pic 6

Find the adware/malware —> Remove.
chrome-logo-transparent-backgroundRemove Yondoo 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.

  • At this point the threat is gone from Chrome, but complete the entire guide or it may reappear on a system reboot.


Press CTRL + SHIFT + ESC simultaneously. Go to the Processes Tab. Try to determine which ones are dangerous. Google them or ask us in the comments.


We get asked this a lot, so we are putting it here: Removing parasite manually may take hours and damage your system in the process. We recommend downloading SpyHunter to see if it can detect parasite files for you.

Right click on each of the problematic processes separately and select Open File LocationEnd the process after you open the folder, then delete the directories you were sent to.



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 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

Remember to leave us a comment if you run into any trouble!

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