This Computer Is BLOCKED.html Scam

Also Known As: "This Computer Is BLOCKED.html" virus
Distribution: Low
Damage level: Medium

"This Computer Is BLOCKED.html" removal instructions

What is "This Computer Is BLOCKED.html"?

"This Computer Is BLOCKED.HTML" is a scam presented on a deceptive, untrustworthy website. Like most fraudulent websites of this type, it attempts to trick people into believing that something is wrong with the operating system or computer. In this case, it displays a fake alert stating that the Windows Operating System detected unusual activity and urges visitors to contact scammers via the telephone number provided. The website is also designed to cause browser crashes by downloading various files. Generally, people do not visit this deceptive website intentionally - potentially unwanted applications (PUAs) cause these redirects. Furthermore, these sites collect browsing-related data and feed users with intrusive ads.

This Computer Is BLOCKED.html scam

This website displays a pop-up window "VIRUS ALERT TO MICROSOFT" stating that the visitor's computer (and registration key) is blocked and urges users not to close the website or restart the computer. It also explains that this situation happened due to one (or more) of the following reasons: the Windows registration key is illegal; illegal software is installed; the Windows system is infected and is proliferating viruses over the Internet, or; it is hacked and being used from an undefined location. According to the "This Computer Is BLOCKED.HTML" scam, the computer was blocked to protect the user's security. To reactivate the system, users are encouraged to contact the "Microsoft helpline". The website informs visitors that Windows has detected unusual activity and ignoring this situation might affect data stored on the computer or lead to unwanted tracking of financial activities. To report this 'unusual activity', people are encouraged to call the +1-844-880-6292 number. Scammers have designed this deceptive website to make it appear like an official Microsoft site, however, Microsoft has nothing to do with it. Generating these bogus websites, which are similar or identical to official sites, helps scammers to trick more people into believing that there are system problems that need to be resolved immediately. As mentioned, this website downloads various files that cause browser crashes. This behaviour might lead some people to believe that the warnings are legitimate, however, if contacted, these scammers often encourage users to purchase software or pay for 'online technical guidance'. In this way, criminals responsible for these websites attempt to extort money from regular users. We strongly recommend that you ignore the "This Computer Is BLOCKED.HTML" scam. if you arrive at this website accidentally, close it. Some of these sites prevent visitors from closing them. In this case, use Task Manager and end the browser process, or restart the computer. Do not restore the closed session the next time you open the browser, since this will return you to the deceptive website (or another untrustworthy site that led you there in the first place).

The aforementioned PUAs cause unwanted redirects to untrustworthy websites (such as the one detailed in this article), record data, and deliver intrusive ads. These PUAs collect IP (Internet Protocol) addresses, search queries, URLs of visited websites, geo-locations, and other browsing-related information. They also gather personal details. Developers continually share this data with third parties (possibly cyber criminals) who misuse it to generate revenue. Many PUAs deliver intrusive ads that conceal underlying content of any visited website. This is achieved by displaying them through tools that enable placement of third party graphical content on any site. When clicked, they often redirect to untrustworthy (potentially, malicious) websites. These ads can also execute scripts that download and install other unwanted apps. Thus, having these applications installed can lead to problems relating to privacy, browsing safety, or even identity theft.

Threat Summary:
Name "This Computer Is BLOCKED.html" virus
Threat Type Phishing, Scam, Social Engineering, Fraud
Symptoms Unauthorized online purchases, changed online account passwords, identity theft, illegal access of one's computer.
Distribution methods Deceptive emails, rogue online pop-up ads, search engine poisoning techniques, misspelled domains.
Damage Loss of sensitive private information, monetary loss, identity theft.
Removal

To eliminate This Computer Is BLOCKED.html virus our malware researchers recommend scanning your computer with Spyhunter.
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There are many deceptive websites on the internet used by cyber criminals to promote scams. Some other examples include Error Code XLMR01F7985, Windows Is Not Activated, and Activate Your Windows Now. Scammers use these websites to trick people into paying for unnecessary products (software) or services that will supposedly solve problems (fix errors, remove viruses, and so on) that do not actually exist. Most PUAs are very similar: they are promoted as legitimate apps providing 'useful' features, tools, and so on. In fact, these promotions are simply attempts to trick people into downloading and installing PUAs that provide no real value and are designed only to generate revenue for their developers.

How did potentially unwanted applications install on my computer?

Potentially unwanted apps can sometimes be downloaded from their websites, however, people usually install them through intrusive ads or when software developers apply a deceptive marketing method called "bundling". Developers use bundling to trick people into downloading and installing unwanted apps together with regular software. Typically, information about the inclusion of potentially unwanted apps is not disclosed - they are hidden in "Custom", "Advanced" and other similar settings of the installation/download processes. Therefore, skipping software installation/download steps without checking the available settings/options can lead to unintentional installation of PUAs.

How to avoid installation of potentially unwanted applications?

Download software using official sources and direct links only. Do not use third party software downloaders/installers, since these are usually monetized by promoting unwanted apps. Avoid using peer-to-peer networks such as torrent clients, eMule, and so on. Install software carefully. Do not skip download/installation steps - study each step by checking all available settings/options such as "Custom", "Advanced", etc. Note that most malicious (or other untrustworthy/deceptive) advertisements may seem legitimate, however, clicking them risks being redirected to pornography, adult dating, gambling, and other untrustworthy, potentially malicious sites. If you often experience redirects to dubious websites, check for unwanted, unknown or suspicious installations (add-ons, extensions, and plug-ins on the browser, and programs on your computer). Uninstall/remove all suspicious installations immediately. If your computer is already infected with PUAs, we recommend running a scan with Spyhunter for Windows to automatically eliminate them.

The appearance of "This Computer Is BLOCKED.html" pop-up (GIF):

This Computer Is BLOCKED.html scam gif

Text presented in "This Computer Is BLOCKED.html" pop-up:

VIRUS ALERT FROM MICROSOFT
This computer is BLOCKED
Do not close this window and restart your computer
Your computer's registration key is Blocked.
Why we blocked your computer?
This window's registration key is illegal.
This window is using pirated software.
This window is sending virus over the Internet.
This window is hacked or used from undefined location.
We block this computer for your security.
Contact Microsoft helpline to reactivate your computer.

 Screenshot of a deceptive website promoting "This Computer Is BLOCKED.html" scam:

deceptive website promoting This Computer Is BLOCKED.html scam

Text presented in a deceptive website:

Microsoft Support
Microsoft Security Tollfree:
+1-877-286-9666

 

Windows Support Alert
Your System Detected Some Unusual Activity.
It might harm your computer data and track your financial activities.
Please report this activity to +1-877-286-9666

Instant automatic removal of This Computer Is BLOCKED.html 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 This Computer Is BLOCKED.html 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:

Removal of potentially unwanted applications:

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.

PUAs 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 application, scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.

Remove rogue extensions from Internet browsers:

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

Internet Explorer logoRemove malicious add-ons from Internet Explorer:

Removing rogue extensions 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 rogue extensions from Internet Explorer step 2

Optional method:

If you continue to have problems with removal of the "this computer is blocked.html" 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 rogue extensions from Google Chrome step 1

Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome), select "More tools" and click "Extensions". Locate all recently-installed suspicious browser add-ons and remove them.

Removing rogue extensions from Google Chrome step 2

Optional method:

If you continue to have problems with removal of the "this computer is blocked.html" 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 rogue extensions 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 on "Extensions", in the opened window, remove all recently-installed suspicious browser plug-ins.

Removing rogue extensions from Mozilla Firefox step 2

Optional method:

Computer users who have problems with "this computer is blocked.html" 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 "this computer is blocked.html" virus from your computer, please ask for assistance in our malware support forum.

Post a comment:
If you have additional information on "this computer is blocked.html" 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
This Computer Is BLOCKED.html 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 "This Computer Is BLOCKED.html" virus on your mobile device.
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Platform: Windows

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