Blocksly Virus


Blocksly is an ad-displaying browser component that gets attached to the browser without the user’s informed knowledge and begins to put ads all over the screen. Blocksly shouldn’t be let to stay on your computer or else it may lead to exposure to malware.

The Blocksly virus may possibly keep track of your browsing activity

Pesky Adverts that appear on your monitor are most likely the effort of a Browser Hijacker program. The problem with them is that they are inclined to seriously disturb your normal web browsing experience. If you’re searching for the means to get rid of the banners, as well as the program which is making them, then you’ve come to the right place. Most often, the source of this irritating issue is software known as Blocksly . The good news is that in the next short article you will learn how to successfully uninstall it from your PC and protect yourself from the adverts.

When confronted with the obstructive Ads generated from Blocksly , most users’ first reaction is to presume their computer has fallen prey to a nasty virus. You can easily understand the confusion because the word “virus” is commonly being used for every single problem related to computers that isn’t a technical one. However, victims infected by a real PC virus can have their files stolen or corrupted or they may get spied on, while machines infected with Browser Hijackers such as will not be damaged in any serious way. At worst, the affected machine may be slower to work with and more annoying, but nothing more than that. Just as a contrast, some readers might have heard about threats like Ransomware – one of the nastiest types of viruses out there. Now the Ransomware viruses are a global issue as they are infamous for stealing huge amounts of money from their victims by holding their files as a hostage until a ransom has been transferred. A program such as Blocksly , on the other hand, can’t do anything like that on your PC and that means you can calm down and take a breath – you aren’t dealing with a virus and your PC is not in danger. In fact, below we will show you how to remove the Blocksly  quickly and safely and forget that it ever was on your PC.

Issues related to Browser Hijackers

Even though the Browser Hijacker does not fit into any virus category, we should warn you that such software could still accidentally expose your computer to more damaging threats. You see,  the primary concern normally is its adverts. If you’re not careful with those advertisements that constantly pop on your screen, you may get redirected to some kind of a malicious webpage, which could infect your PC with some harmful malware. This all sounds pretty intimidating and could be a good reason to uninstall such software from your PC right away. Yet another possibly unwanted result of Blocksly and Good Day With Captcha on your system is that it may possibly keep track of your browsing activity. The program may take note of everything you do on the Internet and then processes that data to deliver user-oriented ads. Don’t allow the program to do this by allowing it to stay on your Computer – private data about you can get into the wrong hands. Also keep in mind that such software can use a significant portion of system resources to run, so customers with slower Computers may experience sluggishness, unresponsiveness, and freezing of the screen.


Danger LevelMedium (nowhere near threats like Ransomware, but still a security risk)
Symptoms Aggressive ads, pop-ups and banners may constantly spam your screen.
Distribution MethodSpam messages, free downloads, software bundles and shareware sites. 
Detection Tool

Remove Blocksly Virus

To try and remove Blocksly quickly you can try this:

  1. Go to your browser’s settings and select More Tools (or Add-ons, depending on your browser).
  2. Then click on the Extensions tab.
  3. Look for the Blocksly extension (as well as any other unfamiliar ones).
  4. Remove Blocksly by clicking on the Trash Bin icon next to its name.
  5. Confirm and get rid of Blocksly and any other suspicious items.

If this does not work as described please follow our more detailed Blocksly removal guide below.

If you have a Windows virus, continue with the guide below.

If you have a Mac virus, please use our How to remove Ads on Mac guide.

If you have an Android virus, please use our Android Malware Removal guide.

If you have an iPhone virus, please use our iPhone Virus Removal guide


Some of the steps will likely require you to exit the page. Bookmark it for later reference.

Reboot in Safe Mode (use this guide if you don’t know how to do it).



Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab (the “Details” Tab on Win 8 and 10). Try to determine which processes are dangerous. 


Right click on each of them and select Open File Location. Then scan the files with our free online virus scanner:

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    After you open their folder, end the processes that are infected, then delete their folders. 

    Note: If you are sure something is part of the infection – delete it, even if the scanner doesn’t flag it. No anti-virus program can detect all infections. 


    Hold together the Start Key and R. Type appwiz.cpl –> OK.


    You are now in the Control Panel. Look for suspicious entries. Uninstall it/them.

    Type msconfig in the search field and hit enter. A window will pop-up:


    Startup —> Uncheck entries that have “Unknown” as Manufacturer or otherwise look suspicious.


    Hold the Start Key and R –  copy + paste the following and click OK:

    notepad %windir%/system32/Drivers/etc/hosts

    A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

    hosts_opt (1)

    If there are suspicious IPs below “Localhost” – write to us in the comments.

    Open the start menu and search for Network Connections (On Windows 10 you just write it after clicking the Windows button), press enter.

    1. Right-click on the Network Adapter you are using —> Properties —> Internet Protocol Version 4 (ICP/IP), click  Properties.
    2. The DNS line should be set to Obtain DNS server automatically. If it is not, set it yourself.
    3. Click on Advanced —> the DNS tab. Remove everything here (if there is something) —> OK.

    • After you complete this step, the threat will be gone from your browsers. Finish the next step as well or it may reappear on a system reboot.

    Right click on the browser’s shortcut —> Properties.

    NOTE: We are showing Google Chrome, but you can do this for Firefox and IE (or Edge).


    Properties —–> Shortcut. In Target, remove everything after .exe.

    Browser Hijacker Removal Instructions

    ie9-10_512x512  Remove Blocksly  from Internet Explorer:

    Open IE, click  IE GEAR —–> Manage Add-ons.

    pic 3

    Find the threat —> Disable. Go to IE GEAR —–> Internet Options —> change the URL to whatever you use (if hijacked) —> Apply.

    firefox-512 Remove Blocksly  from Firefox:

    Open Firefoxclick  mozilla menu  ——-> Add-ons —-> Extensions.

    pic 6

    chrome-logo-transparent-backgroundRemove Blocksly  from Chrome:

    Close Chrome. Navigate to:

     C:/Users/!!!!USER NAME!!!!/AppData/Local/Google/Chrome/User Data. There is a Folder called “Default” inside:

    Rename the Folder to Backup Default

    Rename it to Backup Default. Restart Chrome.


    Type Regedit in the windows search field and press Enter.

    Inside, press CTRL and F together and type the threat’s Name. Right click and delete any entries you find with a similar name. If they don’t show up this way, go manually to these directories and delete/uninstall them:

    • HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious.
      HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
      HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random

    If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!


    About the author


    Brandon Skies

    Brandon is a researcher and content creator in the fields of cyber-security and virtual privacy. Years of experience enable him to provide readers with important information and adequate solutions for the latest software and malware problems.

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