Ads Removal

N121adserv Ads “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.

This page aims to help you remove N121adserv Ads. These N121adserv Ads removal instructions work for Chrome, Firefox and Internet Explorer, as well as every version of Windows.

You have most likely found yourself on this page due to a problem with N121adserv Ads. If so, it was probably the numerous ads that drove you nearly insane and pushed you into searching for a reliable way to safely and surely remove this nuisance from your PC. First of all, let us assure you that you are definitely in the right place and there is nothing to worry about. The guide we have provided beneath the following article is simple and is written in step-by-step format with included screen shots as visual aid. Secondly, in case you were wondering and tormenting yourself with the question of how dangerous N121adserv Ads is to your system – it’s hardly a threat.

Many people act under the assumption that N121adserv ads might be some form of a virus. This is not true. It’s most certainly not a virus, so you can relax on that matter. In fact, N121adserv Ads and viruses are about as far apart as you can get. The program you are currently seeking to uninstall is a type of adware, which, as you can derive from the name, is software that distributes ads. Viruses, on the other hand, have all sorts of malicious intents towards you and your machine, including but not limited to encoding your files (ransomware), spying on you (spyware) and destroying valuable files (Trojan Horses).

So, there’s nothing wrong with adware then?

Not quite. Despite not being a genuine type of malware, adware is still classified as a medium threat and many refer to it as a potentially unwanted program or PUP due to its invasive behavior. And with that we don’t only mean the fact that it showers users with veils of pop-ups, banners, box messages and other kinds of advertising materials. We mean that behind all those ads there is a complex process, which is a bit controversial in its nature, as many tend to think of it as a violation of their privacy. Let us explain.

In order to conjure up all the attractive (or not so much) images and compelling (maybe) slogans, N121adserv Ads needs to first get some idea of who you are and get to you know you better, figuratively speaking. How would it accomplish that, it’s just a piece of programming, right? Indeed, but one you shouldn’t underestimate. Adware can start gathering information about you from the moment you install it and start surfing the internet. It will monitor the websites you visit, keep track of your search queries and memorize certain personal information you may have entered on websites that don’t offer data encryption. Scary? Then wait for what comes next. The data is then analyzed in order to start pumping ads that have been optimized to suit your preferences. You might have already noticed that some of the box messages you’re seeing oddly match the things you were looking up online just the other day. Well, that’s adware for you. Furthermore, once there’s no longer use for that particular info, it can later be sold to third parties for some additional profit. And do you know who those third parties are? Neither do we, so they could be literally anyone with pretty much any kind of intentions as to those details.

How do I stop this from coming back?

A very good question indeed and the most correct one you could have possibly asked. In truth, the only great way of dealing with a problem is not letting it anywhere near your device in the first place. So in order to know how to prevent N121adserv Ads from coming back, you need to know how it’s distributed. The first and most common method of distribution is through program bundles. This technique allows developers to package given software together with adware, without necessarily disclosing this on the download source. The key to ruining their sneaky plan is in the setup wizard. Or reading the EULA, which more or less nobody does, so let’s just stick with the wizard for now. If you opt for the advanced/manual/custom settings in it, you will see the bundled in software and you will notice boxes opposite the names of those programs with check marks in them. Simply uncheck the boxes and proceed with the installation process – done! You will be adware-free, without getting involved with it at all. We’ve reached the end of the article now, following is the removal guide. Just adhere closely to the instructions and let us know in the comments if this was of help to you.


Name N121adserv Ads
Type Adware/Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms Numerous ads distributed on pretty much all of the websites you visit.
Distribution Method Program bundling is by far the developers’ favorite technique, but spam emails and other adware are also known methods  of distribution.
Detection Tool N121adserv Ads may be difficult to track down. Use SpyHunter – a professional parasite scanner – to make sure you find all files related to the infection.

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.


N121adserv Ads Removal

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Reboot in Safe Mode (use this guide if you don’t know how to do it).

This was the first preparation.


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.

Reveal All Hidden Files and Folders.

  • Do not skip this  – N121adserv Ads may have hidden some of its files.

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.

  • Remember this step – if you have reason to believe a bigger threat (like ransomware) is on your PC, check everything here.


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.



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 N121adserv Ads from Internet Explorer:

Open IE, click  IE GEAR —–> Manage Add-ons.

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Find the threat —> Disable. Go to IE GEAR —–> Internet Options —> change the URL to whatever you use (if hijacked) —> Apply.

firefox-512 Remove N121adserv Ads from Firefox:

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

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Find the adware/malware —> Remove.
chrome-logo-transparent-backgroundRemove N121adserv Ads 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.

  • At this point the threat is gone from Chrome, but complete the entire guide or it may reappear on a system reboot.


Press CTRL + SHIFT + ESC simultaneously. Go to the Processes Tab. Try to determine which ones are dangerous. Google them or ask us in the comments.


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.

Right click on each of the problematic processes separately and select Open File LocationEnd the process after you open the folder, then delete the directories you were sent to.



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 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

Remember to leave us a comment if you run into any trouble!

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