Windows Was Blocked Due To Questionable Activity scam

Also Known As: "Windows Was Blocked Due To Questionable Activity" virus
Distribution: Low
Damage level: Medium

"Windows Was Blocked Due To Questionable Activity" removal instructions

What is "Windows Was Blocked Due To Questionable Activity"?

"Windows Was Blocked Due To Questionable Activity" is yet another scam message used to extort money from unsuspecting users. Delivered by deceptive websites, the message states that the system has been blocked and encourages users to immediately contact 'tech support' via a telephone number provided. In fact, these claims are false and you should never call this number. Furthermore, redirects to websites that deliver the "Windows Was Blocked Due To Questionable Activity" message might indicate the presence of potentially unwanted applications (PUAs) on the system.

Windows Was Blocked Due To Questionable Activity scam

This scam message states that Windows Operating System has been blocked and that users must contact tech support (via the "+1-877-640-1433" telephone number) to restore everything. Once contacted, these people will ask users to pay a certain sum of money for assistance (this is not even required, since the "Windows Was Blocked Due To Questionable Activity" error is fake). You should leave the website that displays this scam immediately. Be aware that these sites are often designed to prevent users from closing browser tabs/windows. In this case, terminate the browser process using Windows Task Manager. Do not restore the previous browser session the next time you run the browser, since this will reopen the rogue site.

Websites that deliver fake error messages are often opened by PUAs. Therefore, these redirects can indicate the presence of rogue apps. As well as causing redirects, PUAs are also likely to deliver coupons, banners, pop-ups, and other similar advertisements that can lead to dubious websites and even execute scripts that download/install other PUAs. Therefore, clicking them can result in various system infections. Additionally, intrusive ads are delivered using tools that enable placement of third party graphical content on any site. Therefore, they often conceal underlying content, thereby significantly diminishing the browsing experience. Another important issue is information tracking. PUAs usually gather IP addresses, website URLs visited, web pages viewed, search queries, and other similar data relating to browsing activity. Collected data (IP addresses, website URLs visited, pages viewed, search queries, etc.) often includes personal details that developers sell to third parties (potentially, cyber criminals). These people misuse private data to generate even more revenue. Thus, information tracking can lead to serious privacy issues or even identity theft. These applications should be uninstalled immediately.

Threat Summary:
Name "Windows Was Blocked Due To Questionable Activity" virus
Threat Type Phishing, Scam, Social Engineering, Fraud
Fake Claim The error message states that system has been blocked due to 'suspicious activity' and encourages users to contact the tech support scam.
Tech Support Scammer Phone Number +1-877-640-1433, +1-830-637-7234
Related Domain(s) proguys[.]ml
Detection Names (proguys[.]ml) BitDefender (Malware), Cyradar (Malicious), Kaspersky (Malware), Sophos AV (Malicious), Full List Of Detections (VirusTotal)
Serving IP Address (proguys[.]ml) 138.197.207.29
Symptoms Fake error messages, fake system warnings, pop-up errors, hoax computer scan.
Distribution methods Compromised websites, rogue online pop-up ads, potentially unwanted applications (PUAs).
Damage Loss of sensitive private information, monetary loss, identity theft, possible malware infections.
Removal

To eliminate Windows Was Blocked Due To Questionable Activity virus our malware researchers recommend scanning your computer with Spyhunter.
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Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

"Windows Was Blocked Due To Questionable Activity" shares many similarities with dozens of other scam errors, such as "Microsoft Detected Malicious Virus And Blocked Your Computer", "Hard Drive Safety Delete", and "Error # 0x80092ee9". These scams often claim that the system is infected, not activated, missing files, or damaged in other similar ways, just to trick users into calling fake 'tech support' or downloading various unwanted applications (e.g., system cleaners). In any case, never trust these messages and, if you have already downloaded any of the promoted applications, remove them immediately.

How did potentially unwanted applications install on my computer?

Some PUAs have official download websites, however, most are proliferated using intrusive advertisements and a deceptive marketing method called "bundling" (stealth installation of third party applications together with regular software). Developers hide "bundled" apps behind "Custom/Advanced" settings (or other sections) of the download/installation processes. Furthermore, many users often rush these procedures and skip steps. Additionally, they click various advertisements without understanding the possible consequences. This behavior often leads to inadvertent installation of third party applications. In this way, users expose their systems to risk of various infections and compromise their privacy.

How to avoid installation of potentially unwanted applications?

To prevent this situation, be very cautious when browsing the Internet and downloading/installing software. Bear in mind that intrusive advertisements typically seem legitimate, since developers invest many resources into intrusive ad design. In fact, they usually redirect to dubious websites (gambling, adult dating, pornography, survey, and similar). If you encounter these ads, remove all suspicious applications and browser plug-ins immediately. Furthermore, download programs from official sources only, preferably using direct download links. Third party downloaders/installers often include rogue apps, and thus such tools should never be used. Study each window of the download/installation dialogs using the "Custom" or "Advanced" settings. Opt-out of additionally-included apps and decline offers to download/install them. The key to computer safety is caution. If your computer is already infected with PUAs, we recommend running a scan with Spyhunter for Windows to automatically eliminate them.

Text presented in the "Windows Was Blocked Due To Questionable Activity" pop-up:

Windows was blocked due to questionable activity
Please stop or restart your computer
Call immediately +1-877-640-1433
Instant help without waiting
call +1-877-640-1433 (Toll Free) and improve health of your computer.
Asks for your username and password. ATTENTION: Your password will not be sent to the website your are visiting! +1-877-640-1433 (Toll Free)

Another variant of the "Windows Was Blocked Due To Questionable Activity" pop-up scam:

Windows Was Blocked Due To Questionable Activity scam (sample 2)

Appearance of this website (GIF):

Windows Was Blocked Due To Questionable Activity scam (sample 2) - GIF

Text presented in the pop-up window:

Windows protected your PC

Windows SmartScreen prevented an unrecognized app from starting. Running this app might put your PC at risk. For technical support call on +1-830-637-7234 (Toll Free).

Instant automatic removal of Windows Was Blocked Due To Questionable Activity 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 Windows Was Blocked Due To Questionable Activity 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 "windows was blocked due to questionable activity" 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 "windows was blocked due to questionable activity" 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 "windows was blocked due to questionable activity" 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 "windows was blocked due to questionable activity" virus from your computer, please ask for assistance in our malware support forum.

Post a comment:
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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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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
Windows Was Blocked Due To Questionable Activity 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 "Windows Was Blocked Due To Questionable Activity" virus on your mobile device.
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Platform: Windows

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