Remove N121adserv.com pop-up ads (Virus Removal Guide)

If your web browser is randomly being redirected to the http://n121adserv.com advertisements then it is possible that your computer is infected with an adware program.

N121adserv.com Virus

The adware responsible for the n121adserv.com ads is bundled with other free software that you download off of the Internet. Unfortunately, some free downloads do not adequately disclose that other software will also be installed and you may find that you have installed adware without your knowledge.

Once this malicious program is installed, whenever you will browse the Internet, an ad from n121adserv.com will randomly pop-up.
These ads are aimed to promote the installation of additional questionable content including web browser toolbars, optimization utilities and other products, all so the adware publisher can generate pay-per-click revenue.

When infected with this adware program, other common symptoms include:

  • Advertising banners are injected with the web pages that you are visiting.
  • Random web page text is turned into hyperlinks.
  • Browser popups appear which recommend fake updates or other software.
  • Other unwanted adware programs might get installed without the user’s knowledge.

You should always pay attention when installing software because often, a software installer includes optional installs, such as this n121adserv.com adware. Be very careful what you agree to install.
Always opt for the custom installation and deselect anything that is not familiar, especially optional software that you never wanted to download and install in the first place. It goes without saying that you should not install software that you don’t trust.

How to remove n121adserv.com pop-up ads (Virus Removal Guide)

This page is a comprehensive guide which will remove n121adserv.com adware and other malicious program that may be installed on your machine.
Please perform all the steps in the correct order. If you have any questions or doubt at any point, STOP and ask for our assistance.

To remove the n121adserv.com pop-up ads, follow these steps:
STEP 1: Scan your computer with AdwCleaner
STEP 2: Scan your computer with Malwarebytes Anti-Malware
STEP 3: Double-check for malware with HitmanPro
(OPTIONAL) STEP 4: Reset your browser to the default settings


STEP 1: Scan your computer with AdwCleaner

AdwCleaner is a free utility, which will scan your computer and web browser for the n121adserv.com adware.

  1. You can download AdwCleaner from the below link.
    ADWCLEANER DOWNLOAD LINK (This link will open a new web page from where you can download “AdwCleaner”)
  2. Before starting AdwCleaner, close your web browser, then double-click on the AdwCleaner icon.
    Start AdwCleaner
    Picture of User Account Control If Windows prompts you as to whether or not you wish to run AdwCleaner, please allow it to run.
  3. When the AdwCleaner program will open, click on the “Scan” button as shown below.
    AdwCleaner Scan button
    AdwCleaner will now start to search for adware and other malicious files that may be installed on your computer.
  4. To remove the malicious files that were detected in the previous step, please click on the “Cleaning” button.
    Remove n121adserv.com adware with AdwCleaner
  5. AdwCleaner will prompt you to save any open files or documents, as the program will need to reboot the computer to complete the cleaning process. Please do so, and then click on the “OK” button.
    AdwCleaner removing adware
    When your computer reboots and you are logged in, AdwCleaner will automatically open a log file that contains the files, registry keys, and programs that were removed from your computer.

STEP 2: Scan your computer with Malwarebytes Anti-Malware

Malwarebytes Anti-Malware is a powerful on-demand scanner which will remove the n121adserv.com redirect from your machine. It is important to note that Malwarebytes Anti-Malware will run alongside antivirus software without conflicts.

  1. You can download download Malwarebytes Anti-Malware from the below link.
    MALWAREBYTES ANTI-MALWARE DOWNLOAD LINK (This link will open a new web page from where you can download “Malwarebytes Anti-Malware Free”)
  2. Once downloaded, close all programs, then double-click on the icon on your desktop named “mbam-setup” to start the installation of Malwarebytes Anti-Malware.
    Start Malwarebytes Anti-Malware setup
    Picture of User Account Control You may be presented with a User Account Control dialog asking you if you want to run this file. If this happens, you should click “Yes” to continue with the installation.
  3. When the installation begins, you will see the Malwarebytes Anti-Malware Setup Wizard which will guide you through the installation process.
    Malwarebytes Anti-Malware Installer
    To install Malwarebytes Anti-Malware on your machine, keep following the prompts by clicking the “Next” button.
    Malwarebytes Anti-Malware final screen
  4. Once installed, Malwarebytes Anti-Malware will automatically start and you will see a message stating that you should update the program, and that a scan has never been run on your system. To start a system scan you can click on the “Scan Now” button.
    Malwarebytes Anti-Malware Scan Now
  5. Malwarebytes Anti-Malware will now start scanning your computer for malware. When Malwarebytes Anti-Malware is scanning it will look like the image below.
    Malwarebytes Anti-Malware Scanning for Malware
  6. When the scan has completed, you will be presented with a screen showing the malware infections that Malwarebytes Anti-Malware has detected. To remove the malicious programs that Malwarebytes Anti-malware has found, click on the “Remove Selected” button.
    Remove the malware that Malwarebytes Anti-Malware has detected
    Please note that the infections found may be different than what is shown in the image.
  7. Malwarebytes Anti-Malware will now quarantine all the malicious files and registry keys that it has found. When removing the files, Malwarebytes Anti-Malware may require a reboot in order to remove some of them. If it displays a message stating that it needs to reboot your computer, please allow it to do so.
    Malwarebytes Anti-Malware asking to restart PC
    After your computer will restart, you should open Malwarebytes Anti-Malware and perform another “Threat Scan” scan to verify that there are no remaining threats

STEP 3: Double-check for malware with HitmanPro

HitmanPro is a second opinion scanner, designed to rescue your computer from malware (viruses, trojans, rootkits, etc.) that have infected your computer despite all the security measures you have taken (such as anti-virus software, firewalls, etc.). HitmanPro is designed to work alongside existing security programs without any conflicts. It scans the computer quickly (less than 5 minutes) and does not slow down the computer.

  1. You can download HitmanPro from the below link:
    HITMANPRO DOWNLOAD LINK (This link will open a new web page from where you can download “HitmanPro”)
  2. Double-click on the file named “HitmanPro.exe” (for 32-bit versions of Windows) or “HitmanPro_x64.exe” (for 64-bit versions of Windows). When the program starts you will be presented with the start screen as shown below.
    HitmanPro Installer
    Click on the “Next” button, to install HitmanPro on your computer.
    itmanPro while installing on PC
  3. HitmanPro will now begin to scan your computer for malicious files.
    HitmanPro scanning for n121adserv.com virus
  4. When it has finished it will display a list of all the malware that the program found as shown in the image below. Click on the “Next” button, to remove malware.
    HitmanPro detected malware
  5. Click on the “Activate free license” button to begin the free 30 days trial, and remove all the malicious files from your computer.
    Remove malware with HitmanPro

(Optional) STEP 4: Reset your browser to the default settings

If you are still experiencing issues with the n121adserv.com ads in Internet Explorer (or Microsoft Edge), Firefox or Chrome, we will need to reset your browser to its default settings. This step needs to be performed only if your issues have not been solved by the previous steps.

Internet Explorer

You can reset Internet Explorer settings to return them to the state they were in when Internet Explorer was first installed on your PC.

  1. Open Internet Explorer, click on the “gear iconIE Icon Gear in the upper right part of your browser, then click again on Internet Options.
    [Image: Internet Options in Internet Explorer]
  2. In the “Internet Options” dialog box, click on the “Advanced” tab, then click on the “Reset” button.
    [Image: Reset Internet Explorer]
  3. In the “Reset Internet Explorer settings” section, select the “Delete personal settings” check box, then click on “Reset” button.
    [Image: Reset Internet Explorer to its default settings]
  4. When Internet Explorer has completed its task, click on the “Close” button in the confirmation dialogue box. You will now  need to close your browser, and then you can open Internet Explorer again.
    [Image Reset Internet Explorer settings]

Mozilla Firefox

If you’re having problems with Firefox, resetting it can help. The reset feature fixes many issues by restoring Firefox to its factory default state while saving your essential information like bookmarks, passwords, web form auto-fill information, browsing history and open tabs.

  1. In the upper-right corner of the Firefox window, click the Firefox menu button ([Image: Firefox Menu button]), then click on the “Help” ([Image: Firefox Help button]) button.
    Firefox Help button
  2. From the Help menu, choose Troubleshooting Information.
    If you’re unable to access the Help menu, type about:support in your address bar to bring up the Troubleshooting information page.
    Troubleshooting Information in Firefox
  3. Click the “Refresh Firefox” button in the upper-right corner of the “Troubleshooting Information” page.
    Refresh Firefox button
  4. To continue, click on the “Refresh Firefox” button in the new confirmation window that opens.
    Reset Firefox settings to default
  5. Firefox will close itself and will revert to its default settings. When it’s done, a window will list the information that was imported. Click on the “Finish“.

Note: Your old Firefox profile will be placed on your desktop in a folder named “Old Firefox Data“. If the reset didn’t fix your problem you can restore some of the information not saved by copying files to the new profile that was created. If you don’t need this folder any longer, you should delete it as it contains sensitive information.

Google Chrome

Most malicious programs may add an unwanted extension to your Chrome browse. In this step, we will try to identify and remove any malicious extension that might be installed on Google Chrome.

  1. On your browser, click on the Chrome menu button Three-line-Chrome
  2. Select “More tools” and click on “Extensions“.
    Google extensions
  3. Remove the unwanted extension by clicking on the “Remove from Chrome” button Remove extension from Google Chrome.
    A notice to remove the extension will appear. Click “Remove“.
    Remove Extensions From Chrome
    If you cannot remove an extension as it’s “Installed by enterprise policy“, then you will need to follow our “Remove Installed by enterprise policy extension from Chrome” guide.

Your computer should now be free of the n121adserv.com pop-up ads. You can remove AdwCleaner from your machine, however we recommend that you keep Malwarebytes Anti-Malware and HitmanPro installed, and perform regular computer scans.

If you are still experiencing problems while trying to remove n121adserv.com pop-up ads from your machine, please do one of the following:

Protect your device from viruses

Here are some basic security tips that will help you avoid malware:

  1. Install updates.

    Keep your operating system and apps up to date. Whenever an update is released for your device, download and install it right away. These updates often include security fixes, vulnerability patches, and other necessary maintenance.

  2. Be careful when installing programs and apps.

    Pay close attention to installation screens and license agreements when installing software. Custom or advanced installation options will often disclose any third-party software that is also being installed. Take great care in every stage of the process and make sure you know what it is you're agreeing to before you click "Next."

  3. Don't use keygens and cracks.

    Avoid using Peer-to-Peer (P2P) file-sharing programs, keygens, cracks, and other pirated software that can often compromise your data, privacy, or both.

  4. Install an ad blocker.

    Use a browser-based content blocker, like AdGuard. Content blockers help stop malicious ads, Trojans, phishing, and other undesirable content that an antivirus product alone may not stop.

  5. Be careful what you download.

    A top goal of cybercriminals is to trick you into downloading malware—programs or apps that carry malware or try to steal information. This malware can be disguised as an app: anything from a popular game to something that checks traffic or the weather.

  6. Be alert for people trying to trick you.

    Whether it's your email, phone, messenger, or other applications, always be alert and on guard for someone trying to trick you into clicking on links or replying to messages. Remember that it's easy to spoof phone numbers, so a familiar name or number doesn't make messages more trustworthy.

  7. Back-up your data

    Back up your data frequently and check that your backup data can be restored. You can do this manually on an external HDD/USB stick, or automatically using backup software. This is also the best way to counter ransomware. Never connect the backup drive to a computer if you suspect that the computer is infected with malware.

  8. Secure your device.

    Keeping all the above tips in mind will keep you well on your guard, and installing a good antivirus will monitor your files for unusual changes and other warning signs. Whether you use a PC, a Mac, or a mobile device, Malwarebytes Premium is the strongest protection ever. Malwarebytes sits beside your traditional antivirus, filling in any gaps in its defenses, and providing extra protection against sneakier security threats.

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