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Danger level 7
Common infection symptoms:
  • Annoying Pop-up's

Unknown Security Breach Popup

If you find a questionable pop-up alert that reads "unknown Security Breach", do not worry about its content and your operating system since the Unknown Security Breach pop-up is a deceptive advertisement aimed at making you call the number given. It is important to remain calm when exposed to such a pop-up warning, because the notification is some fraudsters' product designed to swindle computer users out of their money. In order not experience any inconvenience or money loss, you should disregard the bogus suggestions or encouragement given in the warning and close the window. Usually, it is enough to close a scam warning, but sometimes running a system scan might be useful to make sure that no malicious files are running on the computer.

The Unknown Security Breach pop-up is a classic example of a remote tech support scam when unsuspecting computer users are provided with misleading information about the OS performance or the system security status. What does make it so typical? The Unknown Security Breach pop-up is supposedly displayed by Microsoft. However, it is worth paying attention to the domain address, which is The browser window alerting victims about some suspicious activities on the computer also features the logo of Microsoft. Moreover, the whole design of the content resembles the official website of the company. All these features exemplify how fraudsters attempt to provide a persuasive warning that would not arouse a user's suspicion.

The Unknown Security Breach pop-up warns about the attack of ROOT_TROJAN_HARDDISK_HIJACK.exe and the failure of 895-SYSTEM32.exe and some other processes and insist on not restarting the computer so that your valuable data is not lost. The truth is that a system restart would eliminate the scam pop-up and hinder money extortion. Moreover, the wording of the infection should also be taken into consideration. The text seems to be translated from a different language, which is not practiced by Microsoft for sure.

Moreover, the victim is asked to call the toll-free number 1-800-2300-8766 for more information about the issue and technical assistance. We strongly advise you against calling the number given in order to prevent money loss and system malfunctions. Remote computer software support scammers find differnt ways to make use of inexperience computer users. Fraudsters convince victims to reveal their banking information or download software, which turns out to be malware. The consequences are likely to be damaging, not to mention all the financial losses that you might experience if you need to pay for PC fix or other services. If you do not want to get involved in some deceptive events, remove pop-up scam messages, including the Unknown Security Breach pop-up, once they appear on the screen.

Microsoft assures that they would never contact their clients and offer technical support without the user's request in the first place. Thus, you should ignore the Unknown Security Breach pop-up and close its window immediately.

The Unknown Security Breach pop-up is also accompanied by the audio explaining that some actions should be taken to solve the issues detected. Fortunately, the Unknown Security Breach pop-up has been found to be malware-free, meaning that its display on the screen does not trigger any malware downloading processes.

If you are wondering why you have to deal with the Unknown Security Breach pop-up, you should bear in mind that scam warnings may be displayed by unreliable websites or unwanted programs. Hence, it is important to keep away from freeware sharing websites, questionable forums, online scanners, etc. Additionally, it is crucial to keep the operating system protected against malware and spyware.

Below you will find our removal guide which should help you remove the Unknown Security Breach pop-up from your browser. All that you need to do is restart your browsers. If you have any questions regarding the browser reset, feel free to leave your question below in the comment box. In case you suspect that some undesirable program might be running on the computer, do not hesitate to install an anti-malware tool that will sort everything out.

How to remove the Unknown Security Breach pop-up

Internet Explorer

  1. Open the browser and click on the Tools icon.
  2. Select Internet Options and open the Advanced tab in the Internet Options window.
  3. Click Reset.

Mozilla Firefox

  1. Click on the button with three horizontal lines. Click the help icon with a question mark at the very bottom.
  2. Click Troubleshooting Information.
  3. Click on the Refresh button and then Finish.

Google Chrome

  1. Click on the button with three dots in the upper-right corner of the browser.
  2. Click Settings and scroll down.
  3. Click Advanced and scroll down to the very bottom.
  4. Click Reset.
  5. Read the information in the pop-up message and click Reset.

Windows Edge

  1. Open the Settings menu by clicking the button with three horizontal dots in the upper-right corner of the browser.
  2. Click Settings.
  3. Select what you want to clear. Click Show more to find more options.
  4. Click Clear.
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