Your Windows Computer Has Been Blocked Scam

Also Known As: Your Windows Computer Has Been Blocked virus
Type: Adware
Distribution: Low
Damage level: Medium

Your Windows Computer Has Been Blocked removal instructions

What is Your Windows Computer Has Been Blocked?

"Your Windows Computer Has Been Blocked" is a fake error message displayed by a malicious website. Users are redirected to this site by potentially unwanted adware-type programs (PUPs). These apps often infiltrate systems without users' consent. In addition, they collect personally identifiable information and deliver intrusive online advertisements.

Your Windows Computer Has Been Blocked adware

"Your Windows Computer Has Been Blocked" states that the system has been infected and suspicious activity, detected. It is also stated that personal information (banking details, passwords, etc.) is threatened. To resolve the problem and return the system to its previous state, the victim must contact "Windows Support" via a telephone number (1 888-509-7321) provided. They will then supposedly receive help in solving the problem. Be aware, however, that "Your Windows Computer Has Been Blocked" error is fake - simply a scam. Cyber criminals attempt to trick victims into calling and paying for services that are not needed. Therefore, you should ignore this error. Adware-type applications often deliver intrusive online advertisements. To achieve this, developers employ a 'virtual layer' - a tool that enables placement of third party graphical content on any site. The ads often conceal underlying content of visited websites, significantly diminishing the web browsing experience. In addition, they can redirect to malicious websites - clicking them is risky and might result in various computer infections. Another downside is information tracking. Potentially unwanted programs continually record IP addresses, websites visited, pages viewed, search queries, geo-locations, mouse/keyboard activity, and other similar information that might contain private details. This collected data is later shared with third parties (potentially, cyber criminals) who generate revenue by misusing personal information. Therefore, the presence of an information-tracking app on your system can lead to serious privacy issues or even identity theft. These programs must be uninstalled immediately.

Threat Summary:
NameYour Windows Computer Has Been Blocked virus
Threat TypeAdware, Unwanted ads, Pop-up Virus
SymptomsSeeing advertisements not originating from the sites you are browsing. Intrusive pop-up ads. Decreased Internet browsing speed.
Distribution methodsDeceptive pop-up ads, free software installers (bundling), fake flash player installers.
DamageDecreased computer performance, browser tracking - privacy issues, possible additional malware infections.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
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"Your Windows Computer Has Been Blocked" shares many similarities with other fake errors such as Internet Security Damaged, Windows Firewall Security Damaged, You Have A ALUREON Virus, etc. Claims that the system is missing files, infected, or damaged in other similar ways are merely attempts to scare and trick victims into calling fake customer support and paying for help. Adware-type applications offer various 'useful features', however, these apps are designed only to generate revenue for the developers and regular users receive no significant value. Potentially unwanted programs deliver intrusive online advertisements (via the "Pay Per Click" [PPC] advertising model) and collect various information (which is later sold to third parties).

How did adware install on my computer?

Adware is usually distributed using a deceptive marketing method called "bundling" - stealth installation of PUPs with regular software. Developers know that most users rush the download/installation processes and skip most steps. Therefore, bundled programs are hidden within the "Custom/Advanced" settings. Skipping this section often leads to inadvertent installation of rogue apps.

How to avoid installation of potentially unwanted applications?

Firstly, PUPs are distributed using the bundling method. Therefore, never rush the download or installation processes. Closely analyze each step using the "Custom/Advanced" settings. Secondly, cancel all third party apps listed for download/installation. The key to computer safety is caution.

Fake error message presented within the pop-up:

* YOUR WINDOWS COMPUTER HAS BEEN BLOCKED *
Windows System Alert!!
System may have been infected due to unexpected error! Please Contact Windows Support at 1(888)509-7321 Immediately! to unblock your computer. Suspicious Activity Detected. Your Browser might have been hijacked or hacked.
ANONYMOUS ACTIVITY
Private and Financial Data is at RISK:
Your credit card details and banking information
Your e-mail passwords and other account passwords
Your Facebook, Skype, AIM, ICQ and other chat logs
Your private & family photos and other sensitive files
Your webcam could be accessed remotely by stalkers
IMMEDIATELY CALL WINDOWS SUPPORT AT 1(888)509-7321

MORE ABOUT THIS POTENTIAL INFECTION:
Seeing these popup’s means that you may have a virus installed on your computer which puts the security of your personal data at a serious risk. It’s strongly advised that your call the number above and get your computer inspected before you can continue using internet, especially for Shopping or Banking. Call immediately for assistance.

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
▼ DOWNLOAD Malwarebytes By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.

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.

Your Windows Computer Has Been 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 Your Windows Computer Has Been 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 Your Windows Computer Has Been Blocked ads from Internet Explorer step 2

Optional method:

If you continue to have problems with removal of the your windows computer has been 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 Your Windows Computer Has Been 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 Your Windows Computer Has Been Blocked ads from Google Chrome step 2

Optional method:

If you continue to have problems with removal of the your windows computer has been 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 Your Windows Computer Has Been 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 Your Windows Computer Has Been Blocked ads from Mozilla Firefox step 2

Optional method:

Computer users who have problems with your windows computer has been 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 (Chromium) logoRemove malicious extensions from Microsoft Edge:

Removing adware from Microsoft Edge step 1

Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the upper-right corner of Microsoft Edge), select "Extensions". Locate all recently-installed suspicious browser add-ons and click "Remove" below their names.

Removing adware from Microsoft Edge step 2

Optional method:

If you continue to have problems with removal of the your windows computer has been blocked virus, reset your Microsoft Edge browser settings. Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge) and select Settings.

Microsoft Edge (Chromium) reset step 1

In the opened settings menu select Reset settings.

Microsoft Edge (Chromium) reset step 2

Select Restore settings to their default values. In the opened window, confirm that you wish to reset Microsoft Edge settings to default by clicking the Reset button.

Microsoft Edge (Chromium) reset step 3

  • If this did not help, follow these alternative instructions explaining how to reset the 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 your windows computer has been blocked virus from your computer, please ask for assistance in our malware support forum.

Post a comment:
If you have additional information on your windows computer has been 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
Software uninstall instructions
Malware activity

Global malware activity level today:

Medium threat activity

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

QR Code
Your Windows Computer Has Been 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 Your Windows Computer Has Been Blocked virus on your mobile device.
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