Removal Guide

Remove “Ads by Square Corner” Virus

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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Ads by Square Corner Overview

WARNING! All READERS, PLEASE BEGIN HERE! If you are visiting this removal guide, then you know you have been infected by Ads by Square Corner. What you probably don’t know, however, is that Ads by Square Corner is a part of the “adware” (an acronym for advertisement and malware) class, and this class has several characteristics you need to be firmly aware of. If you do not pay attention here, you are likely prone to falling prey in the clutches of the people who created this thing, as it invariably relies on trickery. It does everything in order to make you install more adware, or worse – ransomware. Ransomware are viruses than encrypt your files and ask for a ransom to unlock them. It is never clear which adware can serve as the front door for ransomware, and for that reason we implore you to keep attention to the following:

  • Two possible fakes, and indeed the most widely used ones, are updates for Java and Flash Player. They may look completely legitimate and useful, but the moment you click on them, a setup file will be downloaded. Ignore them completely to save yourself from possible headaches.
  • Alternatively, the moment Ads by Square Corner manages to infiltrate your system, it has the ability to scan your Control Panel for programs you have installed. It has an in-built library of the most popular such entries, and it can imitate them too.
  • Another possibility is the so-called “banner” scheme. At the upper and lower sections of pages, you may encounter signs about missing plugins or recommended software. Shy away from these, as even in-built “close” signs on them can open an installer.
  • Additionally, redirects to infected websites whenever you open links will start plaguing you. These will not be limited just to clicking the ads; we’ve encountered cases where they appear when you click on completely unrelated links. Immediately exit the websites if you find yourself there, as they are a breeding ground for viruses. Just being connected to them is very dangerous.

Additionally we have identified at least one other side effect Ads by Square Corner brings about. It’s a so-called sluggishness of the system. Some browser crashing, stuttering, and instability are all present as well. The situation is different on a case by case basis, according to how new and powerful the machine is, but it is felt by all. The issue here is that the advertisements displayed are purely generated by your PC. In normal circumstances the ads are a part of the web pages’ designs, but now they are superimposed on top. Having to generate them, your PC’s CPU is having a hard time processing everything, thus it becomes slower.


How to Remove Ads by Square Corner


Our first step here is a reboot in Windows Safe Mode. If you already know how to do it, just skip this and proceed to Step 2. If you do not know how to do it, continue reading:

For Windows 98, XP, Millenium and 7 Users:

Restart your computer. To be sure you don’t miss the window of time when you need to press it, just spam F8 as soon as the PC starts booting. In the new menu, choose Safe Mode With Networking.


Proceed to Step 2.

For Windows 8 and Windows 8.1 Users:

 Press the Windows Key and R at the same time. Select the Boot tab in the new window that appears.


Then check the Safe Boot option and click OK.  Click  Restart in the new pop-up.

system- config

Proceed to Step 2.

For OS X Users:

When you Mac is turned off, press the Power Button. After you hear the Startup Sound, immediately press and hold the Shift key until the Apple logo appears.

Proceed to Step 2.


  Ads by Square Corner has infected ALL of your browsers. Apply the steps separately for each one.

ie9-10_512x512  For Internet Explorer Users:

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

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Find Ads by Square Corner . Disable it.

If your Home Page is different from the usual, click IE GEAR —–> Internet Options>edit the URL box with your preferred search engine, and click Apply.

firefox-512  For Mozilla Firefox Users:

Open Firefoxclick on mozilla menu (top right) ——-> Add-ons.

pic 5.

Hit Extensions next.

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Ads by Square Corner  should be somewhere around here –  Remove it.

chrome-logo-transparent-background For Google Chrome Users

 Start Chrome, click chrome menu icon —–>More Tools —–> Extensions.


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In  Extensions,  find the virus and  select  chrome-trash-icon.

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 Click chrome menu icon   again, and proceed to Settings —> Search (the fourth tab), select Manage Search Engines.  Remove anything but the search engines you normally use.

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safari For Safari Users:

Open Safari, and click Safari —–>Preferences —–> Extensions—–>Uninstall the malware.


(Works for Windows XP, Windows 7, Windows 8, Windows 8.1)

Hold windows-buttonand R together. Write appwiz.cpl  in the new field, then click OK.


You are now in the Control Panel. Search around for Ads by Square Corner and anything else suspicious-looking.   Uninstall  it/them. Also, be extremely careful. Viruses often spend one last ditch effort to trick you into installing more of their kind. If you see a screen like this when you click Uninstallchoose NO:



This is perhaps the most important and difficult step, so be extremely careful. Open the Task Manager by right clicking on the Taskbar and choosing Start Task Manager.


Once it opens, choose the Processes Tab. Look at all of the processes in front of you and try to determine which ones are a virus. Google them or ask us in the comments and we will provide the best assistance we can. If the virus returns later on after you supposedly removed it, the reason is that you missed something here.


Right click on each of the virus processes separately and select Open File Location. Also, End the process after you open the folder. Just to make sure we don’t delete any programs you mistakenly took for a virus, copy the folders somewhere, then delete the directories you were sent to.

STEP 5 – Optimization

And that’s it. Well done for removing Ads by Square Corner. We’ve prepared a short and sweet optimization guide, specifically designed for users who just removed a virus. It is completely free, you do not need to download anything, and it’s not very time consuming. If you are interested, you can check it out here.

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