Ads Removal

Koilk “Virus” Removal

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.

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This page aims to help you remove Koilk “Virus”. Our removal instructions work for Chrome, Firefox and Internet Explorer, as well as every version of Windows.

Koilk is an adware program, that presents itself as a helpful browser tool, but many users complain that this program is actually filling their screen with nagging ads, pop-ups, and banners all the time. We also found that this software tends to redirect the users’ searches and advertises not one, but many sites, different ads, links, pop-ups and new tabs. Such activity is surely irritating; moreover, the adware has the ability to affect many web browsers – including Google Chrome, Internet Explorer, Mozilla Firefox, Safari, Opera, and others. After integrating with Chrome, for example, this adware usually inserts some browser extensions and starts to initiate various redirects and aggressive ads generation. Removing the ads by closing them usually leads to the generation of more and the streaming has no end. That’s why the only effective solution to eliminating the ads invasion is to fully uninstall Koilk form the system. This is not as complicated as removing a virus, and fortunately, it does not require the professional help of a specialist. You can do it on your own if you strictly follow the instructions in the removal guide below, but before you do so, we highly recommend you familiarize yourself with the real nature of adware.

Koilk is not a virus but still, here is what it may cause:

Programs of the adware type are supposed to help you find the best offers and sales, prompt you to certain ads and land you on certain sponsored websites. Such activity is closely related to the online advertising industry and does not aim to cause you harm the way that a Trojan horse or nasty Ransomware infection would. However, by keeping adware like Koilk on your computer, you will soon begin to notice some dubious facts about this software.

Normally, adware is based on the pay-per-click model. This means that instead of providing you with some functionality, Koilk basically serves the needs of its owners, who try to generate income from the clicks of sponsored commercials and have the best interest to expose you to as many pop-ups as possible. What is more, in order to gain more information on what you like and to be able to prompt you to more relevant ads, the people behind programs like this may also collect information about your IP address, technical information for your computer, search history, and surfing. This means that while on your computer system, the adware may silently track you down and transmit some data back to its developers or other third party marketers.

Koilk “Virus” 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:

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 Koilk 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 Koilk from Firefox:

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

pic 6

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

As we reviewed the Privacy Policy of Koilk, we found also that the content of the displayed sponsored web pages may not always reflect products, services, or information provided by the adware owners. Such statements sound dubious and probably suggest that the ads you may click on may eventually take you to web pages that have nothing to do with the content they present. If you happen to click on a misleading link or a site, you may suddenly land on illegal web location or get exposed to some unfamiliar or hazardous content where viruses like Trojans, Ransomware, and Spyware may be lurking. The best way to prevent that is to remove the ads permanently and uninstall their source from your system.

Can you get infected with this program without knowing?

Potentially unwanted programs like Koilk are often installed without the knowledge of the computer user. You’re probably wondering how it can get inside your system without permission? In general, this app moves along with other free software or sharing software, and the only way to make sure you will not download and install it is to choose the right installation settings. Do not choose widely used default or standard settings – these buttons are a common trick of the creators of potentially unwanted programs to mislead the users to install some optional applications along with the software they desire.

This is because, usually, agreements to install such programs as adware, browser-hijackers, add-ons or plug-ins are hidden behind these options. If you do not want to give your approval for unwanted installations, you have to choose “custom” or “advanced” installation settings because they let you see what is included in the software package and reject those applications you do not want to install. So, to avoid unwanted apps, you just have to uncheck “I agree with installing […]” and so on. This is all you have to do to protect yourself from being invaded by Koilk and other similar software.

Now to remove it safely, please proceed to the instructions or scan your PC with the professional Koilk removal tool for fast and effective results.


Name Koilk
Type Adware
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms Generation of various ads, pop-ups, banners and intrusive new tabs.
Distribution Method Freeware sites, shareware platforms, free downloads from the web, software bundles, automatic installers
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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