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Chrome/Firefox Security Warning Pop-up Removal (August 2018 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 Chrome/Firefox Security Warning. Our removal instructions work for Chrome, Firefox and Internet Explorer, as well as every version of Windows.

A number of reports have recently been addressed to our “How to remove” team, concerning a program called Chrome/Firefox Security Warning. The affected users complain that this program has somehow managed to integrate itself inside their browsers (Chrome, Firefox, Opera, IE, etc.) and has set changes to their homepage and default search engine without their approval. What is more, when they attempted to roll back or remove the imposed changes, they appear again the next time the browser gets restarted. The normal browsing often gets disturbed by various ads, new tabs, blinking banners and sudden redirects, which lead to random sponsored pages. Most of the people, who contacted us, say that this activity constantly adds frustration and irritation to their daily browsing experience and for this reason, they are eagerly looking for an effective way to remove Chrome/Firefox Security Warning.  Fortunately, this program looks more like a browser hijacker rather than a serious virus infection. That’s why we believe the instructions in the Removal Guide below will be all that you need to safely get rid of the browsing disturbance.

What is a browser hijacker?

Programs, which tend to hijack the users’ browsers for advertising purposes are naturally called Browser hijackers. Such pieces of software are normally developed to aggressively promote certain services and products and earn revenue from Pay-Per-Click and other online revenue-earning models. Chrome/Firefox Security Warning is a program of this type, which is set to integrate itself within all browsers on a computer and make changes to their homepage or search engine. The program may also install some new toolbars and initiate frequent redirects, all with the idea to expose you to certain ads, websites, and offers. Basically, if you have a browser hijacker on your system, every time you try to open a new tab or search for something on the web, you may have to deal with increased amount of online commercials, banners, blinking boxes and messages, which may constantly interrupt you and prompt you to click on their links.

Chrome/Firefox Security Warning Pop-up Removal

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:

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 Chrome/Firefox Security Warning 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 Chrome/Firefox Security Warning from Firefox:

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

pic 6

Find the adware/malware —> Remove.
chrome-logo-transparent-backgroundRemove Chrome/Firefox Security Warning 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

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!

Does Chrome/Firefox Security Warning pose a threat?

Many users have asked us in their reports if Chrome/Firefox Security Warning could be dangerous. Such software indeed could look doubtful and rather irritating, especially given that it may manipulate your web searches and redirect you to web locations you may not want to visit. However, to the relief of all the affected users, a browser hijacker is not the same thing as a Trojan horse or a Ransomware virus. This software will not attempt to corrupt your computer, encrypt your files or cause some other major system damage or malfunction. In its nature, a Hijacker application like Chrome/Firefox Security Warning is seen as a legitimate advertising tool, which definitely distinguishes it from malware.

Still, there a number of reasons why you might not want such a program on your computer. The most obvious one is the changes that the hijacker may impose to your browser settings without your approval. Such actions, though used for advertising purposes, may eventually lead to exposure to threats and potential malware distributors and it is not very difficult to guess how this could happen. Basically, all it could take is a redirect to an infected website or a fake ad, which may deliver Ransomware, Trojans and many other nasty malware to your system. The hijacker may accidentally generate a potential malicious transmitter without actually seeking to harm your system, but still, this risk is worth consideration.

Besides, programs like Chrome/Firefox Security Warning may significantly reduce the quality of your browsing by affecting the browser in an unpleasant way. Being busy with loading sponsored commercials, your Chrome, Firefox, Opera or Internet Explorer may become unresponsive to your searches and may start to freeze, lag or crash more often than what is normal. Chrome/Firefox Security Warning may run in the background of your system constantly, eating up a fair share of your machine’s resources for rather useless activity.

How to uninstall the browser hijacker completely?

If you’ve had enough of browsing disturbance, and you wish to browse the web in peace once again, the instructions in the Removal Guide below and the professional help of the Chrome/Firefox Security Warning removal tool may be what you need. They are trusted enough to assist you in finding and uninstalling all the components, that Chrome/Firefox Security Warning may have added to your system.

Once you have eliminated the Hijacker, don’t forget to ensure that your computer stays safe in the future. To avoid browser hijackers, our general advice is to always pay close attention to the software programs that you install. In most of the cases, programs like Chrome/Firefox Security Warning are bundled inside the installers of other programs as “suggested” or “recommended” components and if you don’t disable them manually, you will surely end up with them on your PC. That’s why, opt for Advanced/Custom/Manual installation options to have full control over any given setup wizard and always be selective with your download sources.


Name Chrome/Firefox Security Warning
Type Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms  Unexpected redirects, changes in the brower’s homepage or search engine.
Distribution Method Software bundles, free installers, free download links, ads, spam, email messages, torrents, freeware sites.
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.

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