Severity scale:  
  (48/100)

McAfee has Blocked your Windows. How to remove? (Uninstall guide)

removal by Julie Splinters - - | Type: Malware

McAfee has Blocked your Windows is a computer virus that locks users' screens in order to make them call fake tech support

McAfee has Blocked your Windows
McAfee has Blocked your Windows is a technical support scam that locks users' screen and prompts them to call the provided number in order to retrieve the code that would unlock the device. Unfortunately, users are asked to pay money for such a "service"

McAfee has Blocked your Windows is a fake alert that is displayed on users' screens after they get infected with malware. This technical support scam, unlike most other ones in the wild, is not generated inside Google Chrome or another browser but is an actual screenlocker which prevents victims from using their computer. The fake message claims that the device is suspected of alleged “Suspicious Activity” and that it is infected with viruses. Victims are urged to call (301)900-8084 to contact the fake McAfee technicians so that they could provide you with the code that would unlock the PC. As evident, McAfee has Blocked your Windows is merely a scam that uses the well-established name of reputable security vendor for its malicious deeds. However, there is no need to contact cybercriminals and rather use a code that was figured out by security experts already: H3J9-Z7K5-W5Y1-Q6L4.[1]

Name McAfee has Blocked your Windows
Type Technical support scam
Category Malware
Related files McAfee Tool.exe
Similar scams FBI virusIRS virus; Ukash virus 
Systems affected Windows OS
Recognized as
  • TR/FakeSupport.zzzlc
  • Win32.Trojan-Ransom.Filecoder.P@gen
  • Trojan.FakeSupport
  • W32.Trojan.Gen
  • RDN/Generic FakeAlert
  • Trojan:Win32/Casdet!rfn
  • Trojan/Win32.FakeAlert.C3134821
  • Gen:Variant.MSILPerseus.178033, etc.
Symptoms Locked screen; inability to use the computer
Infection means Unsafe websites, spam emails, fake updates, etc.
Code to unlock the PC H3J9-Z7K5-W5Y1-Q6L4
Termination Use security software like Reimage, SpyHunterCombo Cleaner or Malwarebytes Malwarebytes

Screenlockers like McAfee has Blocked your Windows might resemble ransomware infection, apart from that it does not touch personal files, thus, is less devastating. Nevertheless, the virus is real, and the device is compromised as long as it is affected. To be able to use your computer again, users need to enter the code and then remove McAfee has Blocked your Windows virus from their machine using reputable application.

McAfee has Blocked your Windows fake message states the following:

McAfee has Blocked your Windows. 

This PC has been blocked because of Suspicious Activity Detected. To Protect the Windows Services and its members all McAfee Technical Department (301) 900-8084.
McAfee Security Alert Code: 055BCCAC9FEC 

Your PC has been blocked because we detected an unusual activity on your computer.
Your Computer might be Infected by Harmful Viruses.
These viruses are well known for identity and credit card theft.
Further action on this computer or any other device on your network might reveal private information and involve serious risks.
McAfee Technicians will help you getting the Code to Unblock your Computer.
Please Call McAfee Technical Department (301) 900-8084. 

Call McAfee Technical Department: (301) 900-8084

Bad actors use common scamming techniques: they alert users that there is a problem with their machine and threaten them with consequences (“identity and credit card theft”), creating a feeling of urgency. Additionally, crooks often use well-known names of industry giants, such as Google, Microsoft, as well as security vendors like McAfee (there is a very similar scam that looks exactly the same apart from a different color tone – “Webroot has Blocked your Windows”). Finally, users are unable to operate their computers due to the locked screen. For that reason, many might believe the fake alert and call the provided number.

Those who contact McAfee has Blocked your Windows authors, might be asked to do the following:

  • Download and install bogus software;
  • Pay for the fake support services;
  • Agree to provide remote access rights;
  • Provide sensitive information (name, email, banking details, etc.).

Due to that, users might lose a significant amount of money for software they don't need or by paying for bogus services. Additionally, personal information can be sold to criminals, and remote access will grant crooks the ability to install malware directly onto the device. Therefore, do not believe McAfee has Blocked your Windows scam – your information is not in danger as long as you don't contact criminals by the provided number.

Before you can proceed with McAfee has Blocked your Windows removal, you need to enter the code H3J9-Z7K5-W5Y1-Q6L4 at the bottom of the screen. This will unblock your PC. To terminate malware, you should use one of the security applications that can recognize the threat, such as Reimage or SpyHunterCombo Cleaner.[2]

Be alert while browsing the internet – do not download questionable executables

Because the scam is not promoted by adware within the browser but is rather a real infection that compromises your device, it is most likely not distributed via software bundling. It is a deceptive technique used by freeware and shareware authors that allows them to hide the unwanted apps within software installers. Nevertheless, some bundles hosted on unsafe sites might include malware inside, not only potentially unwanted programs. For example, some of the Djvu ransomware variants were spread via adware bundles back in January 2019.[3]

It is highly likely that those who got infected with malware that locks the screen downloaded a fake installer from a third-party site, or got tricked by fake updates. Additionally, spam emails might be responsible for some of the infections. Therefore, make sure you scan every executable with security software or with online scanners like Virus Total. It is also vital to keep your operating system and installed applications up to date.

Unlock your computer and terminate McAfee has Blocked your Windows virus

If you are unable to use your computer because of the McAfee has Blocked your Windows virus infection, you need to enter H3J9-Z7K5-W5Y1-Q6L4 code at the bottom of the screen to regain the control of your device. However, as the virus will still be inside, so you need to eliminate it by installing and scanning your PC with anti-malware software such as Reimage or SpyHunterCombo Cleaner. It should remove McAfee has Blocked your Windows infection immediately.

You should not try manual McAfee has Blocked your Windows removal, as this threat is not a potentially unwanted program, but is straight out malware that heavily modifies your Windows system. Thus, please use our instructions below on how to access Safe Mode with Networking in order to each the safe environment and perform the scan from there.

 

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What to do if failed?
If you failed to remove virus damage using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to remove virus damage. 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.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with SpyHunter.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Combo Cleaner.

To remove McAfee has Blocked your Windows, follow these steps:

Remove McAfee has Blocked your Windows using Safe Mode with Networking

To remove  McAfee has Blocked your Windows virus safely, you should enter Safe Mode with Networking as follows:

  • 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 McAfee has Blocked your Windows

    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 McAfee has Blocked your Windows removal.

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

Remove McAfee has Blocked your Windows using System Restore

You can also use System Restore to kill the virus:

  • 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 McAfee has Blocked your Windows. 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 McAfee has Blocked your Windows removal is performed successfully.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from McAfee has Blocked your Windows and other ransomwares, use a reputable anti-spyware, such as Reimage, SpyHunterCombo Cleaner or Malwarebytes Malwarebytes

About the author

Julie Splinters
Julie Splinters - Malware removal specialist

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