Cupduck “Virus” Removal Chrome/Firefox/IE

If your Firefox, Chrome or IE browser seems to have been invaded by some sketchy and unpleasant program that causes all sorts of annoying ads, banners, box messages and pop-ups to appear on your screen as soon as you open the browser, then you probably have Cupduck “Virus” on your PC. This is a potentially unwanted program that is categorized as Adware and here you will learn everything you might need to know about this type of software. Since you are most likely looking for a way to uninstall and eliminate the unpleasant browser-invading application, we have prepared for you a manual which contains instructions on how to remove Cupduck “Virus”. It is important to understand that uninstalling the program might not be enough to fully eliminate it which is why it is advisable that you complete each of the steps from the guide. Also, note that Adware programs like Cupduck “Virus” are very widely spread and the chances of you encountering another one in the future are relatively high. Therefore, we advise you to also read the rest of this article before you go for the guide so that you known how to handle Adware in the days to come.

What is its goal?

Obviously, the main purpose of a typical Adware program such as Cupduck “Virus” would be to spam the user’s browser with various adverts. However, what is the idea behind those ads and why are they so incredibly obstructive and annoying? Well, there is a method for earning revenue through Internet advertising known as Pay-Per-Click. With this scheme, the creator of the intrusive Adware is capable of generating substantial amounts of income through their program. As long as a big enough number of people have the unpleasant software installed on their computer and as long as those users click onto the ads it displays inside the browser, there will be a constant flow of money towards the developer of the Adware.

Is Adware useless?

Depending on the specific program, the answer to that question might vary. For example, there are applications and software tools out there that can actually be quite helpful and beneficial to the regular customer, yet are still regarded as Adware because of the ads they display. Note that in many cases, developers choose to implement an Adware element within their products as a way to earn revenue without making the user pay for the actual program, thus keeping it free. However, there are also Adware programs that are pretty much useless and are just there to annoy you while at the same time profiting its creators at the expense of your patience and normal browsing experience. The sad truth is that most software that falls under the Adware category is like that which is why people generally consider programs that generate ads to be unwanted.

Can Adware harm your computer?

On the flip side of the coin, there’s the question of whether or not Adware programs are harmful. On its own, an application like Cupduck “Virus” is probably not going to be able to cause any actual damage to your machine or do anything to your personal files since it is not some sort of Trojan horse or Ransomware virus. However, through the ads it generates, the unpleasant program might potentially expose your machine to various online threats. Therefore, if you want to keep your PC safe from any malicious PC viruses the likes of Spyware, Worms, Trojans or Ransomware, we strongly advise you to avoid clicking onto any of the nagging banners, box messages and pop-ups that the intrusive program generates.

How did it get inside your system?

Most users have no idea how they got Adware on their computer. This is understandable since most programs of this category are known to use stealth installation techniques in order to get to more PC’s. Some of the more popular methods used to distribute Adware are spam messages that contain hyperlinks or file attachments, misleading online offers and ads as well as shady torrent and data-sharing sites. One especially effective technique for spreading Cupduck “Virus” is the file-bundling method, where the unwanted software is combined with another program and gets installed along with it if the user isn’t careful. For that reason, you must always be on your guard when attempting to install any new software, especially if it is free. It is important to carefully look through the installation menu and see if there are any added installs that might potentially be Adware. If you see that there is something suspicious that has been bundled with the main program, be sure to uncheck it since this will leave it out of the installation process.

Cupduck “Virus” Removal

Before you begin completing the steps from the following guide, we advise you to place a bookmark on this page or have it opened on a separate device since some of the following steps will require you to close your browser.

Enter Safe Mode. If you don’t know how to do it, use this guide.


Open the Task Manger by pressing Ctrl+Shift+Esc. Go to the processes/details Tab and take a look at the resulting list. If you see a process with the name of the unwanted program or looks shady, right-click on it and select Open File Location. If you believe it is part of the infection, delete the files.


Use the Winkey+R key combination to open the Run window and in the search field type appwiz.cpl. Hit Enter and in the resulting list, look for recently installed programs that look potentially unwanted. If you find anything – uninstall it.


Re-open Run and this tie type msconfig. Hit Enter again and in the resulting window, go to the Startup tab. See if there are any shady programs there and if anything looks suspicious uncheck it and then select OK.

In the Start Menu search field, copy-paste the following line: notepad %windir%/system32/Drivers/etc/hosts . Open the first result and look at the bottom of the file where it says “Localhost”. If there are any IP addresses below that, tell us what they are in the comments since they might be coming from the unwanted software.


Type Network Connections in the Windows search field and click on the first result. Right-click on the adapter that you are using at the moment and go to Properties > Internet Protocol Version 4 (TCP/IP) > Properties.

If the DNS line is not set to Obtain DNS server automatically, make sure to check that option.

Now go to Advanced > DNS tab and remove everything in DNS server addresses, in order of use.


Right-click on your browser’s icon and select Properties. Delete everything in Target that is after .exe”.

For Chrome users

Close Chrome and go to this folder: C:/Users/*Your username*/AppData/Local/Google/Chrome/User Data. Change the name of the Default folder to Backup Default. Re-open Chrome.

For Firefox users

Open Firefox and click on the Main Menu > Add-ons > Extensions. If you see anything suspicious there, remove it.

For IE users

When you open the browser, go to Tools > Manage Ad-ons and remove the unwanted software if you see it there. Next, go to Tools > Internet options and change the homepage URL to whatever you are normally using.


Open Run (Winkey+R), type Regedit and click on OK. Next, press Ctrl+F and type the malware name. Hit Enter and delete everything that gets found.

If there are no results from the search, manually visit those folders in the Registry Editor.

  • HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Run
  • HKEY_CURRENT_USER/Software/Microsoft/Internet Explorer/Main

If you find there any suspicious keys that have names with a lot of random letters and numbers, delete them or if you are not sure, tell us in the comments what you saw.

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Adrian Bitterson

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