The problem of iStart123 in the home page of your browser is surely a serious issue with your PC. This is the problem related to the presence of browser hijacker in your computer. This useless application is actively spread today along with many other cost-free programs downloaded by users from various online resources. The installers of such free programs generally clearly mention about all third-party software offered to be installed by default, but the problem is that users often fail to notice this information, and just click “Next” and “I agree” buttons all the time. This is how they end up facing all sorts of useless applications in their PCs, including iStart123 virus. In this guide we will help you to remove it from your computer.

iStart123 malware

This iStart123 is a browser hijacker developed by the team of Chinese guys responsible for development of many other browser hijackers and adware programs. If you would like to avoid its unwanted installation into your computer, then you definitely need to be very careful when installing any free programs into your PC. Always select the option of a custom installation, instead of the standard one, when you deal with any freeware while installing it. It is also mandatory that you carefully read the End User’s License Agreements of such free programs before actually installing them. This will help you to know in advance what exactly your suggested to install into your computer by default, as a part of the bundled software installation offer.

If your browser is hijacked by iStart123, this means that you will see istart123.com displayed in the home page of it. Plus, along with the section where you may start your “search” through istart123.com, you will also see a lot of annoying ads displayed in the home page of your hijacked browser. When you look for something through this hijacker, it will redirect you through some of other pseudo search engines, which will also display a lot of annoying sponsored links displayed together with “search” results redirected through them. You will not find any relevant information when looking for the information through iStart123. Instead, you will mainly see such annoying ads and sponsored links. Clicking them, by the way, is strongly not recommended! You may be redirected to a lot of other third-party websites, which could infect your system even more with tons of other junkware and potentially unwanted applications.

It is not as easy to remove iStart123 virus, by the way. It has a special module which prevents you from removing it in an easy way. This module is called Search Protect, and it is powered by HpUI.exe running process. This Search Protect is a potentially unwanted program inside of the SupTab folder of the Program Files section of your Windows operating system. So, in order to remove iStart123 completely you will need to get rid of SupTab, Search Protect and HpUI.exe from your computer. To fix this serious problem with your computer, to remove the malware listed above and to fix your hijacked browser please follow the tutorial below, which includes ways of both manual and automatic removal of this browser hijacker from your computer.


Download antimalware we recommend you to get rid of iStart123 automatically (click on the button below):

IMPORTANT NOTICE before you download! GridinSoft Trojan Killer is a shareware application. Its 15-day free trial is only able to remove 2 (two) infected items for free. In case your system is seriously infected payment must be made for its full registered version, which will remove all threats identified during the scan of your computer. If your computer requires a powerful real-time protection from GridinSoft Trojan Killer to prevent your computer from being infected with iStart123 and similar browser hijackers in the future, payment needs to be made for its license key after 15 days of its free trial expire. If you would like to extend the duration of free trial period of GridinSoft Trojan Killer and the limit of infected items to be removed during this free trial, please create the support ticket by going to this online form. We will give you a personal temporary license key to evaluate GridinSoft Trojan Killer and will send it to you by email, hoping that you will seriously consider purchasing its full version for ultimate antimalware protection.

Steps to uninstall iStart123 automatically:

  • Download GridinSoft Trojan Killer through the download button above.
  • Install the software and scan your computer with it.
  • At the end of scan select the action you would like Trojan Killer to perform with infected items in your PC (“Delete“, “Ignore“, “False positive” and “Move to quarantine” actions are available). You may select some specific action for single infected item, or apply such actions to all items:
  • scan_ended

  • Click on “Apply” button to apply these actions selected by you.
  • In the upper menu of GridinSoft Trojan Killer click on “Tools” button (in the form of suitcase) and select the option “Reset browser settings“:
  • tools_reset_browser_settings

  • Choose browsers you want to be reset and select specific reset options. Finally, click on “Reset” button as shown below:
  • reset_browser

How to prevent your PC from being infected with iStart123 and similar browser hijackers using GridinSoft Trojan Killer.

  • In the upper menu of GridinSoft Trojan Killer click on “Protection” button (in the form of shield) and click on “Start“:
  • protection_start

  • You will notice this option enabled in system tray of your PC:
  • protection_on_in_tray

  • With this option enabled, Trojan Killer will help you to prevent execution of malicious files by you ahead of time:
  • malicious_item_blocked

  • We recommend that you click on the “Confirm” button each time threat is detected by Trojan Killer with “Protection” mode enabled.

Milestones for manual removal of iStart123.

  1. Restoring the home pages of your infected browser to default parameters.
  2. Fixing the Desktop shortcuts and Quick Launch icons of your browsers infected by iStart123.
  3. Additional steps to fix Mozilla Firefox browser.
  4. Resetting specific browsers (optional).

Milestone number one (1). Restoring the home pages of your infected browser to default parameters.

Restoring the home page of Internet Explorer:

  • Click on gear-wheel icon of Internet Explorer in the upper right part of it, then click on “Internet Options“:
  • Internet Explorer Internet Options

  • In the “General” tab, click on “Use new tab“, or type http://www.google.com or other site you prefer to be displayed in the home page of Internet Explorer, instead of istart123.com:
  • Internet Explorer - use new tab

  • Click on “Apply” and “OK“, then restart Internet Explorer.

Restoring the home page of Google Chrome:

  • In Google Chrome browser, click on the button in the upper right corner of it (in the form of three horizontal lines), then click on “Settings“:
  • How to access Google Chrome Settings

  • Go to “On startup” section, then click on “Set pages“:
  • Google Chrome - On Startup - Set Pages

  • You will see istart123.com page set to be displayed on startup. Click on the “X” button related to it and remove it. Then you may add a new page, such as http://www.google.com, or some other page you want to be displayed in the home page of Google Chrome:
  • Google Chrome Startup Pages

  • Go to “Search” section of Google Chrome Settings, then click on “Manage search engines…“:
  • Google Chrome - Search - Manage Search Engines

  • Remove iStart123 as the default search engine of Google Chrome by clicking on the “X” button related to it, and make Google as the default search engine of Google Chrome by clicking on “Make default” button:
  • Google Chrome Search Engines

  • Click on “Done” and restart Google Chrome.

Restoring the home page of Mozilla Firefox:

  • In Mozilla Firefox browser, click on the button in the upper right corner of it (in the form of three horizontal lines), then click on “Options“:
  • Mozilla Firefox Options

  • In the “General” tab of Mozilla Firefox, click on “Restore to Default” button, then click on “OK“:
  • How to restore Mozilla Firefox home page to default

  • Alternatively, you may select “Show a blank page” in order to see the blank page of Mozilla Firefox on startup:
  • Mozilla Firefox - Show a blank page

  • Restart Mozilla Firefox browser.

Restoring the home page of Opera:

  • In Opera browser, click on “Opera” button in the upper left part of it, then click on “Settings“:
  • Opera Settings

  • Go to the “On startup” section of Opera settings, then click on “Set pages“. Remove (delete) istart123.com page from being displayed on startup of Opera browser, and add http://www.google.com to be displayed instead:
  • Opera Set Pages

  • Do not select the option to continue where you left Opera!
  • Restart Opera browser.

Milestone number two (2). Fixing the Desktop shortcuts and Quick Launch icons of your browsers infected by iStart123.

  • If you use Windows XP, right-click on the Quick Launch icons of all your browsers infected by iStart123, then click on “Properties“. In Windows Vista, 7 and 8 you will need to right-click on Quick Launch icons, and then right-click on the name of your infected browser again. Then click on “Properties“:
  • Fixing Quick Launch icons of browsers

  • Likewise, right-click on Desktop shortcuts of your infected browsers, then click on “Properties“:
  • Desktop shortcut properties of browsers

  • Go to the “Shortcut” tab of your infected browsers and check the destination paths to their main executable files. Make sure that they don’t contain any remnants added by iStart123. If you see any of such rudiments after the main destination path to the main executable file of your infected browser, remove this rudiment, then click on “Apply” and “OK” to save all changes introduced by you:
  • Fixing the Desktop shortcut of hijacked browser

    Note! These are the clean targets to the executable files of today’s most popular browsers:
    “C:\Program Files\Internet Explorer\iexplore.exe” – for Internet Explorer
    “C:\Program Files\Mozilla Firefox\firefox.exe” – for Mozilla Firefox
    “C:\Program Files\Google\Chrome\Application\chrome.exe” – for Google Chrome
    “C:\Program Files\Opera\launcher.exe” – for Opera

  • Make sure that you leave the () symbol after “exe“. Remove such rudiments of iStart123 from both the destination path in the Desktop shortcut and from the destination path in the Quick Launch icon of your infected browser:
  • Fixing the Quick Launch icon of hijacked browser

  • Restart your browser.

Milestone number three (3). Additional steps to fix Mozilla Firefox browser.

  • In Mozilla Firefox type “about:config” in the address bar and hit “Enter” on your keyboard.
  • Click on “I’ll be careful, I promise!” button:
  • Mozilla Firefox about:config

  • This will open the “Settings” page of your Mozilla Firefox browser.
  • Type “keyword.url” in the search box, then right-click on it and reset.
  • Type “browser.search.defaultengine” in the search box, then right-click on it and reset:
  • browser.search.defaultengine

  • Type “browser.search.selectedengine” in the search box, then right-click on it and reset.
  • Look for “browser.newtab.url“. Right-click on it and reset. This is a very important step that will prevent the search page of iStart123 from opening in each new tab of Mozilla Firefox browser.
  • browser.newtab.url

  • Restart Mozilla Firefox browser.

Milestone number four (4). Resetting specific browsers (optional).

Use this fourth milestone only in cases other steps to remove iStart123 didn’t work. You might need to reset your browser infected by iStart123 as explained in the guidelines below.

Instructions to reset Google Chrome browser.

To reset your Google Chrome browser, please follow this guide.

Instructions to reset Mozilla Firefox.

  • In Mozilla Firefox browser, click on the button in the upper right corner of it (in the form of three horizontal lines), then click on “?“:
  • Mozilla Firefox help

  • Click on “Troubleshooting information“:
  • Mozilla Firefox troubleshooting information

  • Click on “Reset Firefox” button:
  • How to reset Mozilla Firefox

  • Alternatively, you may type “about:support” in the address field of Mozilla Firefox browser, hit “Enter” and then press “Reset Firefox” button:
  • Mozilla Firefox about:support

  • Make sure that you carefully read what happens when you reset Mozilla Firefox browser, then click on “Reset Firefox” button:
  • What happens when you reset Mozilla Firefox

  • Restart Mozilla Firefox.

Instructions to reset Internet Explorer browser.

  • Click on gear-wheel icon of Internet Explorer in the upper right part of it, then click on “Internet Options“:
  • Internet Explorer Internet Options

  • Click on the “Advanced” tab, then click on the “Reset” button:
  • Internet Explorer - Advanced Options

  • Please carefully read what will take place when you reset Internet Explorer, then click on “Reset“:
  • How to reset Internet Explorer