WinYahoo Removal (Nov. 2017 Update)

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 WinYahoo. Our removal instructions work for Chrome, Firefox and Internet Explorer, as well as every version of Windows.

In the event of a PUP infection, most first-time encounters result in panic, chaos and a lot of confusion. We are here to make sure that is not the case with infections caused by a program better known as WinYahoo. If this is the first time you have ever had to face software of this type, let’s see if our crystal ball can tell us a little more about what you’re experiencing… We see, we see… a new homepage! And a new default search engine! We also see numerous online ads such as popups and box messages crowding your Firefox, Chrome, Opera or other popular browsing program. And we can also tell that you have been troubled by cases of page redirects that seem to take place when you least want them to, wasting your time on closing new tabs and having to go back to the page you were on before. How well did we do? If this sounds exactly like or close to what you’ve been experiencing lately, we can help. Below is a removal guide containing instructions on how to successfully and fully locate and uninstall WinYahoo from your system, so that no remnants are left behind to plague your browsing.

But first: what is a PUP anyway?

Programs of this type are known for their intrusive behavior and it’s all done in the name of online marketing. These are basically advertising programs designed to promote various products, services sponsored websites, etc. And for there to also be something in it for the developers of this software, they usually employ remuneration models like the popular Pay Per Click scheme, for example. Alternatively, ads can also be paid per view – another common way of doing business. What this results in is a program like WinYahoo that is driven to display large quantities of ads, for which purpose it also tends to ‘hijack’ the browser’s settings.

WinYahoo Removal

If you are a Windows user, continue with the guide below.

If you are a Mac user, please use our How to remove Ads on Mac guide.

If you are an Android user, please use our Android Malware 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).



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.

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:

Drag and Drop Files Here to Scan
Maximum file size: 128MB.

This scanner is free and will always remain free for our website's users. You can find its full-page version at: https://howtoremove.guide/online-virus-scanner/

Scan Results

Virus Scanner Result

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.


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.

ie9-10_512x512  Remove WinYahoo 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 WinYahoo from Firefox:

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

pic 6

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


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.

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

But is this, in fact, a dangerous program of any kind? Can hijackers be compared to scary viruses or harmful malware? Not at all. In fact, this often causes a lot of confusion among users, because it’s not rare for software of this type to be dubbed viruses on the internet. The truth of the matter, however, is this: hijackers are more often than not fully legal pieces of programming that are on a purely marketing mission. They do not possess the malicious traits that many malicious programs do, such as the ability to self-install in your system, or the ability to destroy data on your computer, etc. Nevertheless, despite not qualifying as malware, these are still fairly undesirable programs. In fact, most security experts classify them as potentially unwanted and with good reason, too.

The thing is that a program like WinYahoo can modify certain files in your system registry, once you allow it to become a part of your system. This is done for it to be able to advertise on your screen more effectively, but it also leads to your system becoming less capable to adequately protect itself from any outside threats, such as Trojans, Ransomware and others. And you may very well end up being exposed to threats like that as a result of the constant redirecting that takes place on a daily basis. You never know how safe or secure the web locations that you are sent to are and, frankly, it wouldn’t be new for a user to land someplace that’s been infected by malware. Other unwanted side effects of WinYahoo and other hijackers often involve a worsening of your PC’s overall performance. It can become sluggish, slowed down by all the resources that the hijacker may be consuming in order to support the generation of its ads and such.

And in addition to that, hijackers often rely on dirty, but legal tricks, to get you to install them on your computer. Most of the time they are bundled with other programs and if you install those other programs without bothering to check the advanced settings, you can end up integrating whatever added components there are in it by default. So, in order to avoid this, we highly recommend customizing the setup of any new programs yourself. This will allow you to remove any added programs from the bundle before they get a chance to become a part of your system in the first place.


Name WinYahoo
Type PUP
Danger Level Low
Symptoms Usually a PUP changes the settings of the browser, such as the homepage and default search engine.
Distribution Method Program bundles that are improperly installed are the leading source of PUP problems.
Detection Tool

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.

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!

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