“Critical Security Warning!” virus. How to remove? (Uninstall guide)

removal by Ugnius Kiguolis - - | Type: Malware
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Don’t get fooled by “Critical Security Warning!” pop-ups

“Critical Security Warning!” virus is about to change the misconception about Mac operating system being less vulnerable to malware infections. Indeed, in this day and age, targeting only Windows PCs is not what the malware creators are going to limit themselves to. We can see an increasing number of infections being designed specifically for Mac OS X, Android and even Linux operating systems, successfully infecting them and terrorizing the victims [1]. Critical Security Warning! malware only proves this point. Belonging to the category of Tech Support Scams [2], this virus is not especially malicious by nature but is sure a twisted one. It all starts with a stealthy system infiltration. Tech Support malware does not travel alone. Thus it needs carrier programs to be able to reach computers. And these programs are mostly deployed on the computers with the help of software bundling technique [3]. Bundling is a web marketing technique that involves spreading two or more programs in a single package and, typically, installing them all at the same time. When malware developers exploit this software distribution method, they rebundle these packages and add potentially unwanted programs next to the regular ones. Thus, when carrying “Critical Security Warning!” removal, you should look for unfamiliar components that might have been recently installed or simply scan the computer automatically, using Reimage or similar anti-malware software.

As we have already made it clear how “Critical Security Warning!” hijack works, let us now discuss how this virus behaves on the infected system. One of the most obvious things it does is, of course, generating misleading pop-ups [4]. In fact, these threatening notifications are usually displayed on malicious sites that the victims are forcefully redirected to. Since it is a Tech Support Scam, the virus tries to an impression that the computer is severely damaged and can only be fixed with the help of certified technicians [5]. The scammers press the victims into calling a toll-free number +1-888-225-6662 and contacting certified Apple technicians, who will supposedly help protect your personal files, logins, banking credentials and other sensitive information that is supposedly put at risk by the virus. In reality, you will put yourself at higher risk by calling the indicated number as the scammers may attempt to gain access to your system or sell you questionable software or services. We should point out that the malicious script implemented in these fraudulent sites may even prevent you from closing your browser to enhance the legitimacy of the situation. Nevertheless, you can still terminate the application from the Activity Monitor panel, and all the critical warnings should disappear. Once you do that, you should immediately take steps to remove “Critical Security Warning!” from your computer. To help you with that, we give some useful tips and tricks at the end of the article.

How can you prevent yourself from unknowingly acquiring this virus?

We should remind you that “Critical Security Warning!” PUP mainly spreads bundled inside freeware and shareware packages. This means that to avoid it, you should pay careful attention to what you are downloading and installing on your computer. So, the first thing you can do to prevent the virus from reaching your computer is downloading content only from the trusted web sources. Also, we recommend installing software via Advanced or Custom settings which will reveal the additional installs, and, hopefully, the disguised “Critical Security Warning!” virus. You should opt out the suspicious components manually.

“Critical Security Warning!” removal tips:

Since the scammers spread “Critical Security Warning!” virus under various shapes and titles, it might be quite difficult to locate the malicious program on the computer yourself. Luckily, it is not a problem since there are specialized software that will detect all the malicious files and remove “Critical Security Warning!” PUP automatically. You just need to obtain such a tool and run a full system scan. Of course, we cannot exclude the people who may prefer manual “Critical Security Warning!” removal. A step-by-step guide below this article will explain how to carry out the elimination safely.

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Compatible with Microsoft Windows Compatible with OS X
What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall “Critical Security Warning!” virus. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.

More information about this program can be found in Reimage review.

More information about this program can be found in Reimage review.

Manual “Critical Security Warning!” virus Removal Guide:

Remove “Critical Security Warning!” using Safe Mode with Networking

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

In order to close your browser when it is being blocked by a virus, press Command + Option + Escape, select Google Chrome and press “Force Quit”

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove “Critical Security Warning!”

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete “Critical Security Warning!” removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove “Critical Security Warning!” using System Restore

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of “Critical Security Warning!”. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that “Critical Security Warning!” removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove “Critical Security Warning!” from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

If your files are encrypted by “Critical Security Warning!”, you can use several methods to restore them:

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from “Critical Security Warning!” and other ransomwares, use a reputable anti-spyware, such as Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware

About the author

Ugnius Kiguolis
Ugnius Kiguolis - The mastermind

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References


  • Trevor

    Macs were never as safe as everyone imagined. So. Im not at all surprised tech support scams are designed for these operating systems at this day and age

  • Maddison Gregorson

    IF these warnings are pop-ups could this be that this is an adware?