Ads Removal

FusionCore Virus

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


FusionCore is a rogue browser extension that hijacks the settings of the browser it’s installed on and starts redirecting the user’s searches to some partnering sites. FusionCore doesn’t harm the OS or the browser but it may decrease the computer’s protection against external threats.


The FusionCore Virus will display pop up ads and messages

If FusionCore has changed the starting page of your default browser with some obscure site that it’s trying to promote and if your search engine has also been replaced with some unfamiliar one that only seems to show you advertised results, then it’s best to read all of the information we have prepared for you on this page in order to learn what type of software FusionCore is, what its purpose and abilities are, as well as how you can uninstall it from your system and free your browser from its unwelcome change.

The app you are currently dealing with is a browser hijacker and it can get installed in all kinds of browsers – Chrome, Firefox, Opera, Edge, and so on. Its presence in the browser won’t directly result in harm to your system but it will cause page-redirects and ad-generation in your browser whenever you try to use it. This annoys most people because the ads and the redirects tend to be very aggressive and also tend to only land you on pages that try to sell low-quality goods or services. For most, the sheer irritation caused by this kind of applications is more than enough of a reason to uninstall the hijacker. However, even if you don’t feel particularly bothered by the advertising actions of FusionCore, you should still be aware of the safety aspect of this situation, namely, the fact that a hijacker in your system may seriously compromise the security of your computer and open the path to attacks from way more hazardous forms of malware such as Trojans, Worms, Ransomware cryptoviruses, and Spyware.

What you need to know about the removal of FusionCore

Typically, most regular users aren’t able to properly remove a hijacker because there aren’t any uninstallation wizards for such apps and there may not even be entries for the unwanted app in the Control Panel’s Uninstall a program list or in the extension’s manager in the browser. And even if some users do manage to uninstall the hijacker, more often than not they soon realize that the invasive software has returned to bother them. The reason for this is that most hijackers make some Registry changes in the system and install some helper elements that make it possible for them to automatically reinstall themselves in the browser even after the user has removed them. This is why you will likely need a set of removal instructions to guide you through the removal process and maybe also a specialized removal tool to help you detect any data related to the hijacker that you may have missed. The good news is that you will find both of those things below, so go ahead and use our guide and the recommended removal tool to rid your system of FusionCore.


Name FusionCore
Type Adware
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms Hijackers change the browser settings and then begin to spam its pages with ads. 
Distribution Method File bundling is the most commonly employed technique for spreading such apps.
Detection Tool

Remove FusionCore Virus

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).



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:

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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.


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.

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 FusionCore 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 FusionCore from Firefox:

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

pic 6

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

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