Tii.ai is a program that can continuously forward user searches to sponsored web pages and can fill the browser’s screen with pop-up ads. Users who have Tii.ai on their system report that this program can make unauthorized changes to their browser, thus they seek to remove it.


The Tii.ai Virus will display pop up ads and messages.

If you are constantly being redirected to pages that you have no intentions to visit and your main browser (Chrome, Firefox, Edge, etc.) gets filled with various pop-up advertisements, banners, colorful boxes and sponsored links, then it is highly possible that you have Tii.ai on your system. This program is a browser hijacker and typically is used for online advertising purposes.  That is why, as soon as it nests inside your computer, it seeks to change the default browsers’ key settings (such as the homepage, the search engine, the new tab page, etc.) in order to facilitate its ad-generating and page-redirecting activities.

Tii.ai will usually install some new search engine and will replace the homepage address with a different one that loads a specific site. It also may add some components in the browser that perform automatic redirects to different websites that promote specific products and services. In addition to that, during the usual web browsing process, this software will show dozens of pop-ups, banners and other promotional messages that prompt users to click on third party sites.

Our “How to remove” team, however, has prepared a comprehensive removal guide for those of you who want to effectively uninstall Tii.ai from their system or don’t know how to remove its changes from their web browser. A professional Tii.ai removal tool is also available for those of you who want to quickly reset their browser without losing time. The good thing is that you don’t have to be an expert to deal with the browser hijacker because this  isn’t a virus, a ransomware, a Trojan or some other piece of malware that needs qualified help. Still, a program such as Tii.ai can sometimes be mistaken for malware or some sort of page-redirect virus. Users who have never had a close encounter with a browser hijacker can get very overwhelmed by the fact that it can change their browser’s settings and can redirect them to websites that they do not wish to visit. That’s why they usually seek assistance in uninstalling programs like Tii.ai right away.

In reality, however, the browser hijackers are online advertising  programs that promote other goods, services and websites. They don’t have malicious intentions like real threats such as Trojans, Spyware or Ransomware but what irritates the users the most is the aggressive approach they use when they advertise their sponsored content. Most of the promotional messages that programs like Tii.ai display  come in the form of intrusive pop-ups and hard-to-remove banners and boxes that cover key elements of the page that the users are currently visiting, thus preventing the smooth navigation and access to the page content. Besides, some of the links and the eye-catching offers typically redirect to irrelevant or low-quality websites when they get clicked on. Fortunately, users can easily put an end to the aggressive advertising activities as soon as they remove the browser hijacker and uninstall its components from their web browser.


Name Tii.ai
Type Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms Auto-redirects to unfamiliar websites are common symptoms of a Browser Hijacker in the system.
Distribution Method Such programs are often promoted as free components to different software bundles and automatic installation managers.
Detection Tool

Tii.ai Virus Removal

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

If this does not work as described please follow our more detailed Tii.ai 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.


    Tii.ai Remove Tii.ai from Internet Explorer:

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


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

    Tii.ai Remove Tii.ai from Firefox:

    Open Firefox, click Tii.ai ——-> Add-ons —-> Extensions.


    Find the adware/malware —> Remove.
    Tii.aiRemove Tii.ai 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


    Lidia Howler

    Lidia is a web content creator with years of experience in the cyber-security sector. She helps readers with articles on malware removal and online security. Her strive for simplicity and well-researched information provides users with easy-to-follow It-related tips and step-by-step tutorials.

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