COMPUTER BLOCKED POP-UP Scam

Also Known As: "COMPUTER BLOCKED" virus
Distribution: Low
Damage level: Medium

COMPUTER BLOCKED removal instructions

What is COMPUTER BLOCKED?

"COMPUTER BLOCKED" is a fake error message displayed by a malicious website that users often visit inadvertently - they are redirected by various potentially unwanted programs (PUPs). These applications infiltrate systems without consent (the "bundling" method). PUPs deliver intrusive online advertisements and continually record user-system information.

COMPUTER BLOCKED adware

The message states that Windows Firewall has detected suspicious activity and, for this reason, the Internet connection has been blocked. To solve this issue, victims are encouraged to contact "Microsoft's Technical Support" via a telephone number ("+1-844-392-7021") provided. They are then supposedly guided through the recovery procedure. Bear in mind, however, that the "COMPUTER BLOCKED" message is fake and should not be trusted. Criminals attempt to trick victims into calling and paying for services that are not required. Never attempt to call the aforementioned telephone number - you can remove this error simply by closing the web browser. Another downside is display of advertisements. To deliver pop-up, banner, coupon, and other similar ads, PUPs employ a "virtual layer" - a tool that enables placement of third party graphical content on any site. Therefore, delivered ads often conceal underlying content, significantly diminishing the browsing experience. In addition, they redirect to malicious websites and, thus, clicking them can result in high-risk adware or malware infections. Furthermore, PUPs continually gather IP addresses, URLs visited, pages viewed, search queries, and other similar information. There is a high probability that this collected information will contain personal details that PUP developers share with third parties (potentially, cyber criminals) who misuse private data to generate revenue. This behavior can lead to serious privacy issues or even identity theft. Therefore, the presence of a data-tracking app can result in high-risk adware or malware infections.

"COMPUTER BLOCKED" is virtually identical to Suspicious Ransomware Activity, Error Virus - Trojan Backdoor Hijack, Unknown Security Breach, and dozens of other fake errors. All claim that the system is damaged in some way, however, as with COMPUTER BLOCKED, their purpose is simply to generate revenue for the developers by tricking users into paying for so-called 'technical support'. PUPs have an identical purpose. By offering various 'useful features', they attempt to give the impression of legitimacy. In fact, all are useless for regular users. PUPs cause unwanted redirects, deliver intrusive advertisements, and continually gather user-system information.

How did adware install on my computer?

PUPs are distributed using a deceptive marketing method called "bundling" - stealth installation of third party software with regular (mostly free) applications. Developers know that users often rush the download/installation processes and skip steps. Therefore, they hide PUPs within the "Custom/Advanced" settings. By skipping this section, many users expose their systems to risk of various infections and compromise their privacy.

How to avoid installation of potentially unwanted applications?

There are two simple steps you should take to prevent system infiltration by PUPs. Firstly, choose the "Custom/Advanced" settings and carefully analyze each step. Secondly, decline offers to download/install additional applications and cancel those already included. The key to computer safety is caution.

Another variant of this 'tech support' scam (scammers use the 18883373426 telephone number):

computer blocked MICROSOFT pop-up scam variant 2 BSOD

Text presented within "COMPUTER BLOCKED" pop-up:

Windows Firewall has detected some suspicious activity from your IP address and network connection has been blocked temporarily.
To get it unblocked you need to call on Microsoft Technical Support Desk.
Microsoft Safety & Security Center: +1-844-392-7021
Ring now to get it fixed toll free: +1-844-392-7021

Do not restart the device, this may cause serious damage to the system and network address. Don’t worry, Microsoft brings this free
for you. Please do not shutdown or restart your computer, doing that ay lead to data loss and failure of operating system, hence
non bootable situation resulting complete data loss. Contact administrator department to resolve this issue on toll free
+1-844-392-7021 Official US Local Microsoft Support

Instant automatic removal of COMPUTER BLOCKED virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of COMPUTER BLOCKED virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Adware removal:

Windows 7 users:

Accessing Programs and Features (uninstall) in Windows 7

Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.

Windows XP users:

Accessing Add or Remove Programs in Windows XP

Click Start, choose Settings and click Control Panel. Locate and click Add or Remove Programs.

Windows 10 and Windows 8 users:

Accessing Programs and Features (uninstall) in Windows 8

Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.

Mac OSX users:

Uninstall app in OSX (Mac)

Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.

COMPUTER BLOCKED adware uninstall via Control Panel

In the uninstall programs window, look for any suspicious/recently-installed applications, select these entries and click "Uninstall" or "Remove".

After uninstalling the potentially unwanted program, scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.

Remove adware from Internet browsers:

Video showing how to remove potentially unwanted browser add-ons:

Internet Explorer logoRemove malicious add-ons from Internet Explorer:

Removing COMPUTER BLOCKED ads from Internet Explorer step 1

Click the "gear" icon Internet Explorer options icon (at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently-installed suspicious browser extensions, select these entries and click "Remove".

Removing COMPUTER BLOCKED ads from Internet Explorer step 2

Optional method:

If you continue to have problems with removal of the "computer blocked" virus, reset your Internet Explorer settings to default.

Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows XP

Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows 7

Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.

Reseting Internet Explorer settings to default in Windows 8 - accessing

In the opened window, select the Advanced tab.

Resetting Internet Explorer settings to default on Windows 8 - Internet options advanced tab

Click the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - click the Reset button in the Internet options advanced tab

Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - confirm settings reset to default by clicking the reset button

Google Chrome logoRemove malicious extensions from Google Chrome:

Removing COMPUTER BLOCKED  ads from Google Chrome step 1

Click the Chrome menu icon Google Chrome options icon (at the top right corner of Google Chrome), select "Tools" and click "Extensions". Locate all recently-installed suspicious browser add-ons, select these entries and click the trash can icon.

Removing COMPUTER BLOCKED ads from Google Chrome step 2

Optional method:

If you continue to have problems with removal of the "computer blocked" virus, reset your Google Chrome browser settings. Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.

Google Chrome settings reset step 1

After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.

Google Chrome settings reset step 2

In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.

Google Chrome settings reset step 3

Mozilla Firefox logoRemove malicious plug-ins from Mozilla Firefox:

Removing COMPUTER BLOCKED ads from Mozilla Firefox step 1

Click the Firefox menu firefox menu icon (at the top right corner of the main window), select "Add-ons". Click "Extensions", in the opened window, remove all recently-installed suspicious browser plug-ins.

Removing COMPUTER BLOCKED ads from Mozilla Firefox step 2

Optional method:

Computer users who have problems with "computer blocked" virus removal can reset their Mozilla Firefox settings.

Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, firefox menu icon in the opened menu, click Help.

Accessing settings (Reset Firefox to default settings step 1)

Select Troubleshooting Information.

Accessing Troubleshooting Information (Reset Firefox to default settings step 2)

In the opened window, click the Refresh Firefox button.

Clicking on Refresh Firefox button (Reset Firefox to default settings step 3)

In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.

Confirm your want to reset Firefox settings to default (Reset Firefox to default settings step 4)

safari browser logoRemove malicious extensions from Safari:

removing adware from safari step 1 - accessing preferences

Make sure your Safari browser is active, click Safari menu, and select Preferences....

removing adware from safari step 2 - removing extensions

In the opened window click Extensions, locate any recently installed suspicious extension, select it and click Uninstall.

Optional method:

Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...

resetting safari step 1

In the opened window select all history and click the Clear History button.

resetting safari step 2

Microsoft Edge logoRemove malicious add-ons from Microsoft Edge:

Removing browser hijackers from Microsoft Edge step 1

Click the three horizontal dots icon edge more icon (at the top right corner of Microsoft Edge), select "Extensions". Look for any recently-installed suspicious extensions, right click your mouse on these entries and click "Uninstall".

Removing browser hijackers from Microsoft Edge step 2

Optional method:

Click the three horizontal dots icon edge more icon (at the top right corner of Microsoft Edge), and select Settings.

Resetting Microsoft Edge settings step 1

In the opened tab, click the "Choose what to clear" button.

Resetting Microsoft Edge settings step 2

Click Show more and select everything, and then click the "Clear" button.

Resetting Microsoft Edge settings step 3

  • If this didn't help, please follow these alternative instructions explaining how to reset Microsoft Edge browser.

Summary:

declining installation of adware while downloading free software sampleCommonly, adware or potentially unwanted applications infiltrate Internet browsers through free software downloads. Note that the safest source for downloading free software is via developers' websites only. To avoid installation of adware, be very attentive when downloading and installing free software. When installing previously-downloaded free programs, choose the custom or advanced installation options – this step will reveal any potentially unwanted applications listed for installation together with your chosen free program.

Removal assistance:
If you are experiencing problems while trying to remove "computer blocked" virus from your computer, please ask for assistance in our malware support forum.

Post a comment:
If you have additional information on "computer blocked" virus or it's removal please share your knowledge in the comments section below.

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Removal Instructions in other languages
Malware activity

Global virus and spyware activity level today:

Medium threat activity
Medium

Increased attack rate of infections detected within the last 24 hours.

QR Code
COMPUTER BLOCKED virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of "COMPUTER BLOCKED" virus on your mobile device.
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Platform: Windows

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