A browser hijacker is a type of malware that modifies your web browser's settings without your permission. You might notice your default search engine has changed to an unfamiliar site, your homepage is different, or you are constantly redirected to intrusive advertisements. This guide will walk you through the process of reclaiming your browser and securing your system.

Step 1: Uninstall Suspicious Programs from Your Computer

Often, browser hijackers are bundled with free software or 'cracked' applications. You must remove the source program before fixing the browser settings.

• For Windows: Open Control Panel > Programs and Features (or Settings > Apps). Look for any recently installed software that you don't recognize. Click Uninstall.
• For Mac: Open Finder > Applications. Look for suspicious apps (often named 'Search Marquis', 'AnySearch', or similar). Drag them to the Trash and empty it.

Step 2: Remove Malicious Browser Extensions

Browser hijackers frequently live inside extensions because they have the permission to change what you see on the web.

• Google Chrome: Type chrome://extensions/ in the address bar. Examine every extension. If you see something you didn't install, click Remove.
• Microsoft Edge: Type edge://extensions/ and toggle off or remove suspicious add-ons.
• Mozilla Firefox: Type about:addons and select Extensions to remove unwanted items.

Step 3: Reset Your Default Search Engine and Homepage

Once the malware is gone, you need to manually fix the settings it changed.

• Search Engine: Go to your browser's Settings. Find the Search Engine section and ensure it is set to Google, Bing, or DuckDuckGo. Delete any strange search engines from the 'Manage Search Engines' list.
• Homepage: In Settings, look for 'On startup' or 'Appearance'. Ensure the 'Home button' and 'Startup pages' are set to your preferred URL and not the hijacker's site.

Step 4: Check Your Windows 'Hosts' File

Some advanced hijackers edit the Windows Hosts file to redirect your traffic at the system level, regardless of which browser you use.

• Navigate to C:\Windows\System32\drivers\etc.
• Right-click the hosts file and open it with Notepad.
• Look for any lines at the bottom that list IP addresses followed by website names (like google.com). If you see lines that shouldn't be there, delete them and save the file (you may need Administrator privileges).

Step 5: Run a Deep Malware Scan

Even if the browser looks normal, hidden scripts might remain. Use a specialized tool to ensure the infection is completely gone.

• Download and run Malwarebytes or AdwCleaner (by Malwarebytes). These tools are specifically designed to find PUPs (Potentially Unwanted Programs) and browser hijackers that standard antivirus software might miss.
• Perform a Full Scan and quarantine all detected threats.
• Restart your computer to finalize the cleanup.

Step 6: Prevent Future Hijacking

To avoid a re-infection, always choose 'Custom Installation' when downloading free software to uncheck 'optional' browser tools. Additionally, keep your browser updated and use a reputable ad-blocker to prevent malicious scripts from executing in your browser.

💡 Pro Tip: Keep your software updated to avoid these issues in the future.