Ads Removal

App Square “Virus” Pop-ups Removal (March 2019 Update)

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This page aims to help you remove App Square “Virus”. Our removal instructions work for Chrome, Firefox and Internet Explorer, as well as every version of Windows and Android.

The article that you are about to read now describes the nature and behavioral traits of an adware application called App Square. If you have this piece of software on your computer and if you frequently see “Ads delivered by App Square” all over your screen while using your browser, then the information that you are about to read will give you a better idea of what exactly you are dealing with. Most security experts classify App Square as a potentially unwanted program/application (PUP/PUA), which is specialized in aggressive online advertising. The application is normally compatible with all types of browsers (including secure ones like Chrome, Firefox or Explorer) and may force them to display various sponsored advertisements in the form of pop-ups, redirect links, new tabs, page-redirects, ads and banners. The good news is that App Square does not normally pose any serious danger to the targeted computer because it is not created to corrupt the system like a Trojan Horse or encrypt the data on the computer like a Ransomware cryptovirus. All of its activities come down to one thing – to make you click on the sponsored ads and to visit certain predefined web pages and sites, the creators of which have paid for the promotion by the adware. This is how adware apps earn profits for their developers and at the same time provide exposure to some third-party sites, products, services and so on. However, despite the fact that from a legal point of view this is not something malicious and forbidden, these activities may still lead to significant browsing disturbances such as frequent ads interruptions and browser unresponsiveness or crashes which may prevent you from surfing the web normally. In the long run, the constant generation of various pop-up commercials may turn into a real nuisance, especially to those of you who are using their browser on a daily basis. That’s why if you don’t want to deal with dozens of commercial messages during every browsing session, we suggest you use the instructions in the guide below in a combination with the suggested App Square removal tool to quickly uninstall the adware and permanently remove all of its ads.

We should also mention that, if not removed, the adware may launch some unwanted traffic data collection services in the background of your system in order to learn more about your interests and the products that you are looking for so that it can spam you with more relevant ads. The motives behind this activity are again entirely advertising oriented and your virtual security shouldn’t be at risk. Still, the amount of advertisements that may get displayed on your screen may gradually increase over time and also getting exposed to different random ads, sudden pop-ups and occasional page-redirects may not be the safest thing either. It is perfectly possible that you may happen to click on something misleading or hazardous. And trust us, it can be really unpleasant if you get your machine attacked by some Ransomware cryptovirus or by a Trojan Horse infection because you have allowed your computer to get spammed with questionable ads. That’s why, if you don’t find any particular value in keeping an app like App Square on your PC, it is best to uninstall it when you have the opportunity to do so.


Name App Square
Type  Adware/Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms  This program may spam your screen with various ads and random page-redirect links. 
Distribution Method You may end up with adware when performing careless installation of software bundles, torrents, automatic installers, updates and add-ons. 
Detection Tool

App Square “Virus” Pop-ups Removal

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).

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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:

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Maximum file size: 128MB.

This scanner is free and will always remain free for our website's users. You can find its full-page version at:

Scan Results

Virus Scanner Result

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.


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.

ie9-10_512x512  Remove App Square 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 App Square from Firefox:

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

pic 6

Find the adware/malware —> Remove.
chrome-logo-transparent-backgroundRemove App Square 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!

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