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Remove “System Alert! Add Extension” pop-up virus (Tutorial) - Simple Removal Guide

removal by Linas Kiguolis - - | Type: Adware

“System Alert! Add Extension” alerts are more than an annoyance

Screenshot of “System Alert! Add Extension" pop-up virus

“System Alert! Add Extension” virus triggers fake alerts urging netizens to install shady extensions. Most likely, you may encounter them while getting redirected by a movie streaming site. The messages ask to install a browser extension in order to assure browsing safety. Enabling the installation this suspicious extension may lead to hijacked web browser, installation of an ad-supported application or even malicious program.

“System Alert! Add Extension” might prevent from closing the misleading website. But you should not agree to install the offered extension, click “Cancel” button or mark “Prevent this page from creating additional dialogs” option. It’s a trick. You will be still forced to install the extension.

In some cases, this notification is followed by a voice message that says: “Click Add button to install the extension.” No matter how convincing or threatening robot’s voice is, you should not do what you are asked.

Once you end up on such website, close the browser’s tab. If you cannot do it, you should force-quit and then scan the computer with anti-malware/anti-spyware. The security program, such as Reimage Reimage Cleaner Intego, will help to remove “System Alert! Add Extension” and forget about other negative features of the adware.

As we have mentioned, redirects to this malicious site are usually initiated by an ad-supported program. This potentially unwanted program (PUP) spread in software bundles and enters the system silently. Once it gets inside, it might alter few settings in Windows and web browsers.

Apart from promoting unknown extension, this program might also:

  • apply a virtual layer to display third-party commercial content;
  • redirect to promotional websites;
  • turn text into hyperlinks;
  • deliver fake security alters;
  • deliver fake software updates;
  • track information about users;
  • modify browser’s homepage or/and search engine.

“System Alert! Add Extension” removal is also recommended because adware might deliver third-party ads that lead to infected, phishing or tech support scam websites. Thus, you can easily suffer from cyber criminals, reveal your personal information or let malware[1] to your PC.

Currently, the majority of users who have dealt with this cyber parasite the most are the United States, Canada, and the United Kingdom.[2] However, it might spread further to other parts of the world too.

The image of “System Alert! Add Extension" virus“System Alert! Add Extension" is a fake notification that aggressively asks to install an unknown Chrome extension.

The reason behind fake system messages is adware program

When you’re browsing through adult-themed websites or watch movies on illegal video streaming sites, you might receive “System Alert! Add Extension” pop-up any minute. Obviously, you should not use such sites in order to protect yourself from similar cyber infections.

However, redirects to the misleading site are most of the time caused by an adware program. If you have recently installed freeware or shareware, this undesired app may have sneak inside too. It may have happened if you have installed a program under Quick/Recommended setup.

The problem is that these settings do not openly disclose about third-party apps that may have been included in the software package. Thus, relying on this method, you always risk to let PUPs to get inside your device.

To avoid “System Alert! Add Extension” hijack and similar problems, you should always install new software using Advanced/Custom settings. The most important task is to reject installation of “additional downloads” by unmarking pre-selected entries.

Eliminate “System Alert! Add Extension” threat

If you are tired of forced redirects to suspicious websites and want to get rid of fake system alerts for good, you should scan your computer with reputable anti-malware program and perform automatic “System Alert! Add Extension” removal.

However, if you have plenty of time or do not want to use additional software, you can opt for the manual elimination method. Thus, you need to investigate the system, look up for unknown programs and browser extensions that may have been recently installed.

The instructions below will help you to remove “System Alert! Add Extension” manually. Though, you have to be careful and follow each of the steps carefully.

You may remove virus damage with a help of Reimage Reimage Cleaner Intego. SpyHunter 5Combo Cleaner and Malwarebytes are recommended to detect potentially unwanted programs and viruses with all their files and registry entries that are related to them.

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What to do if failed?
If you failed to remove virus damage using Reimage Intego, submit a question to our support team and provide as much details as possible.
Reimage Intego has a free limited scanner. Reimage Intego offers more through scan when you purchase its full version. When free scanner detects issues, you can fix them using free manual repairs or you can decide to purchase the full version in order to fix them automatically.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Reimage, try running SpyHunter 5.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Intego, try running Combo Cleaner.

To remove “System Alert! Add Extension” pop-up virus, follow these steps:

Get rid of “System Alert! Add Extension” pop-up from Windows systems

Follow the steps below to find and delete adware program that is responsible for delivering “System Alert! Add Extension.” Make sure that any adware-related entries haven't been left on the system. Then check the list of Chrome's extensions and make sure that any unknown add-ons haven't been installed.

To remove “System Alert! Add Extension” pop-up from Windows 10/8  machines, please follow these steps:

  1. Enter Control Panel into Windows search box and hit Enter or click on the search result.
  2. Under Programs, select Uninstall a program.Uninstall from Windows 1
  3. From the list, find entries related to “System Alert! Add Extension” pop-up (or any other recently installed suspicious program).
  4. Right-click on the application and select Uninstall.
  5. If User Account Control shows up, click Yes.
  6. Wait till uninstallation process is complete and click OK.Uninstall from Windows 2

If you are Windows 7/XP user, proceed with the following instructions:

  1. Click on Windows Start > Control Panel located on the right pane (if you are Windows XP user, click on Add/Remove Programs).
  2. In Control Panel, select Programs > Uninstall a program.Uninstall from Windows 7/XP
  3. Pick the unwanted application by clicking on it once.
  4. At the top, click Uninstall/Change.
  5. In the confirmation prompt, pick Yes.
  6. Click OK once the removal process is finished.

Eliminate “System Alert! Add Extension” pop-up from Mac OS X system

If your macOS is displaying some infection symptoms, proceed with the following guide:

Remove “System Alert! Add Extension” pop-up from Applications folder:

  1. From the menu bar, select Go > Applications.
  2. In the Applications folder, look for “System Alert! Add Extension” pop-up-related entries.
  3. Click on the app and drag it to Trash (or right-click and pick Move to Trash)Uninstall from Mac 1

To fully remove “System Alert! Add Extension” pop-up, you need to access Application Support, LaunchAgents, and LaunchDaemons folders and delete relevant files:

  1. Select Go > Go to Folder.
  2. Enter /Library/Application Support and click Go or press Enter.
  3. In the Application Support folder, look for any dubious entries related to “System Alert! Add Extension” pop-up and then delete them.
  4. Now enter /Library/LaunchAgents and /Library/LaunchDaemons folders the same way and terminate all the “System Alert! Add Extension” pop-up-related entries.Uninstall from Mac 2

Remove “System Alert! Add Extension” pop-up from Internet Explorer (IE)

Remove dangerous add-ons:

  1. Open Internet Explorer, click on the Gear icon (IE menu) on the top-right corner of the browser
  2. Pick Manage Add-ons.
  3. You will see a Manage Add-ons window. Here, look for “System Alert! Add Extension” pop-up and other suspicious plugins. Click on these entries and select Disable.Remove add-ons from Internet Explorer

Change your homepage if it was altered:

  1. Open IE and click on the Gear icon.
  2. Select Internet Options.
  3. In the General tab, delete the Home page address and replace it by your preferred one (for example, Google.com).
  4. Click Apply and then select OK.Reset IE homepage

Delete temporary files:

  1. Press on the Gear icon and select Internet Options.
  2. Under Browsing history, click Delete…
  3. Select relevant fields and press Delete.Clear temporary files from Internet Explorer

Reset Internet Explorer:

  1. Click on Gear icon > Internet options and select Advanced tab.
  2. Select Reset.
  3. In the new window, check Delete personal settings and select Reset again to complete “System Alert! Add Extension” pop-up removal.Reset Internet Explorer

Delete “System Alert! Add Extension” pop-up virus from Microsoft Edge

Delete unwanted extensions from MS Edge:

  1. Select Menu (three horizontal dots at the top-right of the browser window) and pick Extensions.
  2. From the list, pick the “System Alert! Add Extension” pop-up-related extension and click on the Gear icon.
  3. Click on Uninstall at the bottom.Remove extensions from Edge

Clear cookies and other browser data:

  1. Click on the Menu (three horizontal dots at the top-right of the browser window) and select Privacy & security.
  2. Under Clear browsing data, pick Choose what to clear.
  3. Select everything (apart from passwords, although you might want to include Media licenses as well, if applicable) and click on Clear.Clear Edge browsing data

Reset MS Edge if that above steps did not work:

  1. Press on Ctrl + Shift + Esc to open Task Manager.
  2. Click on More details arrow at the bottom of the window.
  3. Select Details tab.
  4. Now scroll down and locate every entry with Microsoft Edge name in it. Right-click on each of them and select End Task to stop MS Edge from running.Reset MS Edge

If this solution failed to help you, you need to use an advanced Edge reset method. Note that you need to backup your data before proceeding.

  1. Find the following folder on your computer: C:\\Users\\%username%\\AppData\\Local\\Packages\\Microsoft.MicrosoftEdge_8wekyb3d8bbwe.
  2. Press Ctrl + A on your keyboard to select all folders.
  3. Right-click on them and pick DeleteAdvanced MS Edge reset 1
  4. Now right-click on the Start button and pick Windows PowerShell (Admin).
  5. When the new window opens, copy and paste the following command, and then press Enter:

    Get-AppXPackage -AllUsers -Name Microsoft.MicrosoftEdge | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\\AppXManifest.xml” -VerboseAdvanced MS Edge reset 2

Instructions for Chromium-based Edge

Delete extensions from MS Edge (Chromium):

  1. Open Edge and click select Settings > Extensions.
  2. Delete unwanted extensions by clicking Remove.Remove extensions from Chromium Edge

Clear cache and site data:

  1. Click on Menu and go to Settings.
  2. Select Privacy and services.
  3. Under Clear browsing data, pick Choose what to clear.
  4. Under Time range, pick All time.
  5. Select Clear now.Clear browser data from Chroum Edge

Reset Chromium-based MS Edge:

  1. Click on Menu and select Settings.
  2. On the left side, pick Reset settings.
  3. Select Restore settings to their default values.
  4. Confirm with Reset.Reset Chromium Edge

Erase “System Alert! Add Extension” pop-up from Mozilla Firefox (FF)

Remove dangerous extensions:

  1. Open Mozilla Firefox browser and click on the Menu (three horizontal lines at the top-right of the window).
  2. Select Add-ons.
  3. In here, select plugins that are related to “System Alert! Add Extension” pop-up and click Remove.Remove extensions from Firefox

Clear cookies and site data:

  1. Click Menu and pick Options.
  2. Go to Privacy & Security section.
  3. Scroll down to locate Cookies and Site Data.
  4. Click on Clear Data…
  5. Select Cookies and Site Data, as well as Cached Web Content and press Clear.Clear cookies and site data from Firefox

In case “System Alert! Add Extension” pop-up did not get removed after following the instructions above, reset Mozilla Firefox:

  1. Open Mozilla Firefox browser and click the Menu.
  2. Go to Help and then choose Troubleshooting Information.Reset Firefox 1
  3. Under Give Firefox a tune up section, click on Refresh Firefox…
  4. Once the pop-up shows up, confirm the action by pressing on Refresh Firefox – this should complete “System Alert! Add Extension” pop-up removal.Reset Firefox 2

Uninstall “System Alert! Add Extension” pop-up from Google Chrome

Open Chrome's extensions. Carefully look through the list. If you find some unknown extensions that you do not remember installing, remove them immediately. There's no doubt that they are related to “System Alert! Add Extension” adware. Finally, reset the browser in order to get rid of tracking cookies and other virus-related components.

Delete malicious extensions from Google Chrome:

  1. Open Google Chrome, click on the Menu (three vertical dots at the top-right corner) and select More tools > Extensions.
  2. In the newly opened window, you will see all the installed extensions. Uninstall all the suspicious plugins that might be related to “System Alert! Add Extension” pop-up by clicking Remove.Remove extensions from Chrome

Clear cache and web data from Chrome:

  1. Click on Menu and pick Settings.
  2. Under Privacy and security, select Clear browsing data.
  3. Select Browsing history, Cookies and other site data, as well as Cached images and files.
  4. Click Clear data.Clear cache and web data from Chrome

If the above-methods did not help you, reset Google Chrome to eliminate all the “System Alert! Add Extension” pop-up-components:

  1. Click on Menu and select Settings.
  2. In the Settings, scroll down and click Advanced.
  3. Scroll down and locate Reset and clean up section.
  4. Now click Restore settings to their original defaults.
  5. Confirm with Reset settings to complete “System Alert! Add Extension” pop-up removal.Reset Chrome 2

Get rid of “System Alert! Add Extension” pop-up from Safari

Remove unwanted extensions from Safari:

  1. Click Safari > Preferences…
  2. In the new window, pick Extensions.
  3. Select the unwanted extension related to “System Alert! Add Extension” pop-up and select Uninstall.Remove extensions from Safari

Clear cookies and other website data from Safari:

  1. Click Safari > Clear History…
  2. From the drop-down menu under Clear, pick all history.
  3. Confirm with Clear History.Clear cookies and website data from Safari

Reset Safari if the above-mentioned steps did not help you:

  1. Click Safari > Preferences…
  2. Go to Advanced tab.
  3. Tick the Show Develop menu in menu bar.
  4. From the menu bar, click Develop, and then select Empty Caches.Reset Safari

Do not let government spy on you

The government has many issues in regards to tracking users' data and spying on citizens, so you should take this into consideration and learn more about shady information gathering practices. Avoid any unwanted government tracking or spying by going totally anonymous on the internet. 

You can choose a different location when you go online and access any material you want without particular content restrictions. You can easily enjoy internet connection without any risks of being hacked by using Private Internet Access VPN.

Control the information that can be accessed by government any other unwanted party and surf online without being spied on. Even if you are not involved in illegal activities or trust your selection of services, platforms, be suspicious for your own security and take precautionary measures by using the VPN service.

Backup files for the later use, in case of the malware attack

Computer users can suffer from data losses due to cyber infections or their own faulty doings. Ransomware can encrypt and hold files hostage, while unforeseen power cuts might cause a loss of important documents. If you have proper up-to-date backups, you can easily recover after such an incident and get back to work. It is also equally important to update backups on a regular basis so that the newest information remains intact – you can set this process to be performed automatically.

When you have the previous version of every important document or project you can avoid frustration and breakdowns. It comes in handy when malware strikes out of nowhere. Use Data Recovery Pro for the data restoration process.

About the author
Linas Kiguolis
Linas Kiguolis - Expert in social media

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