Sealoid is potentially unwanted software that can cause unusual behavior in the browser, sudden page redirects, and aggressive ad-generation. Sealoid can be found as an optional feature in free or cheap apps, hidden under the custom setup options of the installer.


The Sealoid Virus manipulate your browser(s)

If you have Sealoid on your computer but are not sure how this app got there, this program-bundling technique is probably what got the unwanted app installed on your computer. Most users forget to check the Custom/Advanced setup settings of the programs they install which is what oftentimes allows hijackers to get installed in the system as well.

Once the unwanted page-redirecting app attaches itself to the main browser on the computer, the first thing it does is it changes the homepage address and installs a new search engine tool. Any browser could get affected in this way and not only Chrome and Firefox. It’s just that those two browsers are the most widely-used ones and that’s why they get hijackers the most often.

The goal of Sealoid

The purpose of this app or any other piece of software that can be categorized as a browser hijacker is to advertise and make money through its paid ads and site promotions. The more users have Sealoid on their PCs, the greater the profit earned by the hijacker. However, since this app doesn’t really benefit the user by providing them with useful features, there’s no reason for people to keep such a hijacker in their systems. The developers of this type of apps, however, don’t want users to uninstall their products because that would decrease the overall profit from the paid popups and banners. That is why most hijackers are rather difficult to uninstall. Those apps are intentionally designed to have tricky uninstallation processes that most users would not be able to complete on their own. Some hijackers even make changes in the Registry settings and secretly install helper elements on the computer, thus allowing themselves to get automatically reinstalled even after having been seemingly removed. This is why, even if you remove Sealoid, it may return to your browser soon after you have completed the uninstallation. It is also why it is very important not only to remove the hijacker but also to eliminate all of the settings changes and additional data that it has left on your computer. Only then could you be certain that this undesirable app would no longer bother you.

Is this app dangerous?

The likelihood of your PC getting harmed by Sealoid is rather low because causing damage is not the purpose of most hijackers. However, the presence on your computer of an advertising app like this one that uncontrollably spams you with promotional content can still mean potential danger. Ransomware, Trojans, and other dangerous viruses can sometimes be found in the sites promoted by such apps. Because of that, it is best to never interact with anything that’s been put on your screen by a hijacker, or else you may fall victim to some harmful Trojan infection or Ransomware virus. In order to ensure that no more unwanted ads and page redirects get spammed on your screen, our suggestion is to uninstall the hijacker with the assistance of the following instructions.


Name Sealoid
Type  Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms  Browser ads, page redirects, search engine changes, etc.
Distribution Method Mainly through spam messages and clickbait banners and links.
Detection Tool

How To Remove Sealoid

To try and remove Sealoid 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 Sealoid extension (as well as any other unfamiliar ones).
  4. Remove Sealoid by clicking on the Trash Bin icon next to its name.
  5. Confirm and get rid of Sealoid and any other suspicious items.

If this does not work as described please follow our more detailed Sealoid 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:


    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.


    Sealoid  Remove Sealoid from Internet Explorer:

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


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

    Sealoid Remove Sealoid from Firefox:

    Open Firefoxclick  Sealoid  ——-> Add-ons —-> Extensions.


    Find the adware/malware —> Remove.
    SealoidRemove Sealoid from Chrome:

    Close Chrome. Navigate to:

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


    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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