N19.biz Virus


N19.biz is a browser hijacking software that changes web browser settings to include unwelcome advertisements in the browser’s search results. N19.biz may replace the existing homepage, the default search engine, or the new tab page with another one, which redirects users to sponsored web sites.


The N19.biz virus

If this strange program has invaded your web browser (it could be Chrome, Firefox, Opera, Safari, etc.) and you’re not sure what to do to remove it, we’ve got just what you need. Below, there is a removal guide with instructions on how to safely detect and uninstall N19.biz, as well as a professional removal tool for an in-depth system scan.

Most probably, the reason you have no patience to get rid of this software is that you’ve noticed some potentially unwanted changes in your web browser that now prevent you from browsing the web as before. A new homepage has probably welcomed you the very moment you opened the browsing app and a new search engine has probably replaced your default search engine without your approval. As a result, now your search results mostly consist of sponsored content. The screen of your browser is also probably flooded with banners, pop-ups, pop-unders, box messages, and links that constantly redirect you to specific websites. But what’s worse, regardless of what you’re trying to do, the browser modifications imposed by N19.biz won’t go away. If you follow the steps in the removal guide below, however, this will help you to locate and uninstall all N19.biz-related files once and for all which will also take care of the changes in your browser.

The N19.biz Virus

But let’s first explain what exactly you’re dealing with the N19.biz virus. The N19.biz virus is a browser hijacker – a type of software created solely for advertisement generation and distribution.

This software is completely legal and has no malicious code which can damage your computer like a virus or malware. Browser hijackers promote different banners, pop-ups, and sponsored redirect links by displaying them on the users’ screens. At the same time, they generate income for their developers based on how many times the users click on the displayed ads. Therefore, getting the users to click on as many advertisements as possible is in the best interest of the developers of programs like N19.biz or P.rfihub.com and they use various methods to increase the chances of landing more clicks from users. For example, they set the browser hijacker to display the ads on top of the web pages you are visiting in such a way that avoiding them would be very difficult. They also keep bombarding you with dozens of ads with the hope that you will eventually click on some of them.

However, interacting with the random on-screen advertisements is not advisable as some of them may redirect you to unreliable web locations and even expose you to malware. In fact, security experts have been warning that malicious ads, also known as malvertisements, are still one of the preferred methods for the distribution of viruses and other widespread threats such as Trojans and Ransomware. Unfortunately, a malicious ad oftentimes cannot be distinguished from a regular one an you may easily get confused and click on the infected advert, believing that you are interacting with a real promotional message. In reality, however, once clicked on, the malvertisement might immediately inject the hidden infection in the computer and you may suddenly be greeted by a Ransomware, a Spyware, or by some other dangerous virus.

Taking this risk into account, you should better be careful with everything that N19.biz displays on your screen and take the necessary steps to remove it before you end up clicking on something misleading or potentially hazardous.


Name N19.biz
Type  Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms  Dozens of sponsored ads, pop-ups and banners may spam your screen the moment you start a new browsing session.
Distribution Method Commonly, Browser Hijackers can be distributed in a bundle with different free software packages, torrents and free download managers.
Detection Tool

anti-malware offerOFFER *Read more details in the first ad on this page, EULA, Privacy Policy, and full terms for Free Remover.

Remove N19.biz 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).



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:

Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
This scanner is free and will always remain free for our website's users.
This file is not matched with any known malware in the database. You can either do a full real-time scan of the file or skip it to upload a new file. Doing a full scan with 64 antivirus programs can take up to 3-4 minutes per file.
Drag and Drop File Here To Scan
Drag and Drop File Here To Scan
Analyzing 0 s
Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
    This scanner is based on VirusTotal's API. By submitting data to it, you agree to their Terms of Service and Privacy Policy, and to the sharing of your sample submission with the security community. Please do not submit files with personal information if you do not want them to be shared.

    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.

    Browser Hijacker Removal Instructions

    ie9-10_512x512  Remove N19.biz 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 N19.biz from Firefox:

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

    pic 6

    chrome-logo-transparent-backgroundRemove N19.biz 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!


    About the author


    Lidia Howler

    Lidia is a web content creator with years of experience in the cyber-security sector. She helps readers with articles on malware removal and online security. Her strive for simplicity and well-researched information provides users with easy-to-follow It-related tips and step-by-step tutorials.

    Leave a Comment