Remove Chromstera Browser Hijacker [Virus Removal Guide]

Chromstera is a browser hijacker that installs its own customized Chromium browser and changes the homepage and search engine to Chromstera Search.

What is Chromstera Browser?

Chromstera is a browser hijacker that installs its own customized Chromium browser with its own startup page and search engine. Most people will use Chromstera thinking it’s the normal Chrome browser.

Here’s a short summary of the changes that the Chromstera may perform on your computer:

• Your web browser’s default homepage and new tab page are Chromstera New Tab.
• Your browser’s search queries are redirected through Chromstera Search, which will redirect to search result pages from search.yahoo.com.
• The Chromstera Chromium-based browser is installed on your computer.

Why I’m seeing the Chromstera Browser?

You are seeing the Chromstera browser because the “Chromstera” program is installed on your computer. Often, this type of program is offered through advertisements or bundled with other software, leaving the user puzzled where this software came from.

You should always pay attention when installing software because often, a software installer includes optional installs. Be very careful what you agree to install.
Always opt for the custom installation and deselect anything that is not familiar, especially optional software that you never wanted to download and install in the first place. It goes without saying that you should not install software that you don’t trust.

To remove the Chromstera browser and check your computer for other malicious programs, please use the free malware removal guide below.

Removal Instructions for Chromstera Browser

This malware removal guide may appear overwhelming due to the number of steps and numerous programs that are being used. We have only written it this way to provide clear, detailed, and easy-to-understand instructions that anyone can use to remove malware for free.
Please perform all the steps in the correct order. If you have any questions or doubts at any point, stop and ask for our assistance.

• STEP 1: Use Rkill to terminate malicious processes
• STEP 2: Uninstall malicious programs from your computer
• STEP 3: Remove malicious browser policies from Windows
• STEP 4: Remove malicious files and folders from Windows
• STEP 5: Reset your browser settings to their defaults
• STEP 6: Use Malwarebytes to remove trojans and browser hijackers
• STEP 7: Use HitmanPro to scan your computer for rootkits and other malware
• STEP 8: Use AdwCleaner to remove adware and malicious browser policies

STEP 1: Use Rkill to terminate malicious processes

In this first step, we will download and run Rkill to terminate malicious processes that may be running on your computer.

RKill is a program that was developed at BleepingComputer.com that attempts to terminate known malware processes so that your normal security software can then run and clean your computer of infections. When RKill runs it will kill malware processes and then removes incorrect executable associations and fixes policies that stop us from using certain tools.

1. Download Rkill.

   You can download RKill to your computer from the below link. When at the download page, click on the Download Now button labeled iExplore.exe. We are downloading a renamed version of Rkill (iExplore.exe) because some malware will not allow processes to run unless they have a certain filename.

   

   RKILL DOWNLOAD LINK
   (The above link will open a new page from where you can download Rkill)

2. Run RKill.

   After downloading, double-click the iExplore.exe icon to kill malicious processes. In most cases, downloaded files are saved to the Downloads folder.
   The program may take some time to search for and end various malware programs.

   

   When it is finished, the black window will close automatically and a log file will open. Do not restart your computer. Proceed to the next step in this guide.

STEP 2: Uninstall malicious programs from your computer

In this second step, we will manually check if any unknown or malicious programs are installed on the computer. Sometimes adware and browser hijackers can have a usable Uninstall entry that can be used to remove them.

Now that the malicious programs have been removed from your computer, we can proceed with the next step in this guide.

STEP 3: Remove malicious browser policies from Windows

In this third step, we will download the Chrome Policy Remover file (credits to Stefan Van Damme) and remove the malicious browser policies. .

1. 
   

   Download the Chrome Policy Remover.

   
   

   Download the “Chrome Policy Remover for Windows” file from the below link. This file is a batch script designed to automatically remove Chrome policies.

   

   CHROME POLICY REMOVER DOWNLOAD LINK
   (The above link will download delete_chrome_policies on your computer.)
   
   

   Note: Windows might display a security warning because the file is a batch script (.bat). This is a standard security measure. Since the Chrome Policy Remover is a trusted tool, clicking “Keep” allows you to proceed with the download.

2. Right-click “delete_chrome_policies.bat” file and select Run as administrator

   We will now run the “delete_chrome_policies.bat” fiel as administrator.Running the delete_chrome_policies file as administrator grants it the necessary permissions to modify system settings related to Chrome policies. This ensures the tool can effectively remove the policies.

   

3. Click Yes/Run at the confirmation prompt and allow the process to complete.

   Windows will ask for confirmation before allowing the script to make changes. Clicking “Yes” or “Run” (depending on your Windows version confirms your intent to run the tool and remove the Chrome policies. The script will then run and automatically remove the policies, after which you can close the command prompt window.

   
   

   

Now that the malicious policies were removed, in the next step, we will reset your browser settings to their defaults.

STEP 4: Remove malicious files and folders from Windows

In this fourth step, we will manually search and remove malicious scheduled tasks and folders on your computer.

1. Delete malicious scheduled tasks.

This infection may create a malicious scheduled task in the Task Scheduler to ensure that it is automatically reinstalled every 5 minutes after it has been deleted. This task may run at regular intervals to ensure that the infection persists on your system.

1. Search for “Task Scheduler” in the windows search as shown below..
   You can also open the Task Scheduler app by pressing the Windows + R buttons and then type “taskschd.msc” and press Enter.
2. In the Task Scheduler window, navigate to the Task Scheduler Library on the left side of the screen.
3. Locate the malicious scheduled task in the list of tasks. It may have a randomly generated name (eg. Chrome_Policy, Chrome_Bookmarks, Chrome_Folder) or may be identified as a suspicious or unknown task. Right-click on the malicious task and select “Delete” from the menu.

2. Delete malicious files located in AppData\Roaming folder

We will now delete the malicious file that is located in the AppData\Roaming folder.

1. Search for “Run” in the windows search as shown below, or press the Windows + R button to open the Run app.
2. In the run app text box, enter “%AppData%” and click OK. Windows will directly open up the Roaming folder which is inside the AppData folder.
   

   

3. In the AppData\Roaming folder, search and delete any unknown folders with names like Default, Chrome32, Energy, Bloom, and Travel (note that the actual name on your computer may be different, but you should look for programs with similar naming conventions).

3. Delete malicious files located in AppData\Local folder

Next, we will delete the malicious folders that are located in the AppData\Local folder and the malicious Chrome browser extensions.

1. Search for “Run” in the windows search as shown below, or press the Windows + R button to open the Run app.
2. In the run app text box, enter “%localappdata%” and click OK. Windows will directly open up the AppData\Local folder which is inside the AppData folder.
   

   

3. In the AppData\Local directory, search and delete the Default, WindowsApp and ServiceApp folders.

   Next, find the Google folder and go to Google > Chrome > User Data > Default (or Profile) > Extensions. Find the malicious extension folder within the Extensions folder and delete it. It may have a randomly generated name or may be identified as a suspicious or unknown extension.

   

4. Remove Chrome Shortcut Modification

This malware can hijack your browser shortcuts to target the malicious files. Here is a short guide on how to remove the Chrome shortcut modification:

1. Right-click on the Google Chrome shortcut on your desktop or Start Menu and select “Properties“.
2. Under the Shortcut tab, look for the “Target” field. This is where any added commands to the shortcut will be. Carefully examine the target path and remove any suspicious looking text that may have been appended, especially anything referencing the AppData folder.
   For example, remove text like “–load-extension=C:\Users%USERNAME%\AppData\Local\Default”.
   The target should point only to the chrome.exe file location, nothing more.
3. Click OK to save the changes and close Properties.
4. Launch Chrome again normally through the shortcut. The extension should no longer load on start up.

You can also right click the shortcut and select “Open File Location” to open the chrome.exe folder. Drag chrome.exe directly to your taskbar to create a clean shortcut.

Now that we have manually removed the malicious tasks and folders from your computer and cleaned your browser shortcuts, we can continue with the next step.

STEP 5: Reset your browser settings to their defaults

In this step, we will remove spam notifications,  malicious extensions, and change to default any settings that might have been changed by malware.
Please note that this method will remove all extensions, toolbars, and other customizations but will leave your bookmarks and favorites intact. For each browser that you have installed on your computer, please click on the browsers tab below and follow the displayed steps to reset that browser.

STEP 6: Use Malwarebytes to remove trojans and browser hijackers

In this step, we will install and run a scan with Malwarebytes Free to remove any infections, adware, or potentially unwanted programs that may be present on your computer.

Malwarebytes stands out as one of the leading and widely-used anti-malware solutions for Windows, and for good reason. It effectively eradicates various types of malware that other programs often overlook, all at no cost to you. When it comes to disinfecting an infected device, Malwarebytes has consistently been a free and indispensable tool in the battle against malware. We highly recommend it for maintaining a clean and secure system.

1. Download Malwarebytes for Windows

   You can download Malwarebytes by clicking the link below.

   

   MALWAREBYTES FOR WINDOWS DOWNLOAD LINK
   (The above link will open a new page from where you can download Malwarebytes)
2.  

   Install Malwarebytes

   After the download is complete, locate the MBSetup file, typically found in your Downloads folder. Double-click on the MBSetup file to begin the installation of Malwarebytes on your computer. If a User Account Control pop-up appears, click “Yes” to continue the Malwarebytes installation.

   

3. Follow the On-Screen Prompts to Install Malwarebytes

   When the Malwarebytes installation begins, the setup wizard will guide you through the process.

   • You’ll first be prompted to choose the type of computer you’re installing the program on—select either “Personal Computer” or “Work Computer” as appropriate, then click on Next.

     

   • Malwarebytes will now begin the installation process on your device.

     

   • When the Malwarebytes installation is complete, the program will automatically open to the “Welcome to Malwarebytes” screen.

     

   • On the final screen, simply click on the Open Malwarebytes option to start the program.

     

4. Enable “Rootkit scanning”.

   Malwarebytes Anti-Malware will now start, and you will see the main screen as shown below. To maximize Malwarebytes’ ability to detect malware and unwanted programs, we need to enable rootkit scanning. Click on the “Settings” gear icon located on the left of the screen to access the general settings section.

   

   In the settings menu, enable the “Scan for rootkits” option by clicking the toggle switch until it turns blue.

   

   Now that you have enabled rootkit scanning, click on the “Dashboard” button in the left pane to get back to the main screen.

5. Perform a Scan with Malwarebytes.

   To start a scan, click the Scan button. Malwarebytes will automatically update its antivirus database and begin scanning your computer for malicious programs.

   

6. Wait for the Malwarebytes scan to complete.

   Malwarebytes will now scan your computer for browser hijackers and other malicious programs. This process can take a few minutes, so we suggest you do something else and periodically check the status of the scan to see when it is finished.

   

7. Quarantine detected malware

   Once the Malwarebytes scan is complete, it will display a list of detected malware, adware, and potentially unwanted programs. To effectively remove these threats, click the “Quarantine” button.

   

   Malwarebytes will now delete all of the files and registry keys and add them to the program’s quarantine.

   

8. Restart your computer.

   When removing files, Malwarebytes may require a reboot to fully eliminate some threats. If you see a message indicating that a reboot is needed, please allow it. Once your computer has restarted and you are logged back in, you can continue with the remaining steps.

   

STEP 7: Use HitmanPro to scan your computer for rootkits and other malware

In this next step, we will scan the computer with HitmanPro to ensure that no other malicious programs are installed on your device.

HitmanPro is a second-opinion scanner that takes a unique cloud-based approach to malware scanning. HitmanPro scans the behavior of active files and also files in locations where malware normally resides for suspicious activity. If it finds a suspicious file that’s not already known, HitmanPro sends it to its clouds to be scanned by two of the best antivirus engines today, which are Bitdefender and Kaspersky.

Although HitmanPro is shareware and costs $24.95 for 1 year on 1 PC, there is no limit on scanning. The limitation only kicks in when there is a need to remove or quarantine detected malware by HitmanPro on your system and by then, you can activate the one-time 30-days trial to enable the cleanup.

1. Download HitmanPro.

   You can download HitmanPro by clicking the link below.

   HITMANPRO DOWNLOAD LINK
   (The above link will open a new web page from where you can download HitmanPro)

2. Install HitmanPro.

   When HitmanPro has finished downloading, double-click on “hitmanpro.exe” (for 32-bit versions of Windows) or “hitmanpro_x64.exe” (for 64-bit versions of Windows) to install this program on your computer. In most cases, downloaded files are saved to the Downloads folder.

   

   You may be presented with a User Account Control pop-up asking if you want to allow HitmanPro to make changes to your device. If this happens, you should click “Yes” to continue with the installation.

   

3. Follow the on-screen prompts.

   When HitmanPro starts you will be presented with the start screen as shown below. Click on the “Next” button to perform a system scan.

   

   

4. Wait for the HitmanPro scan to complete.

   HitmanPro will now begin to scan your computer for malicious programs.
   

5. Click on “Next”.

   When HitmanPro has finished the scan, it will display a list of all the malware that it has found. Click on the “Next” button to have HitmanPro remove the detected items.

   

6. Click on “Activate free license”.

   HitmanPro may now require to activate the free 30-days trial to remove the malicious files. To do this, click on the “Activate free license” button to begin the free 30 days trial and remove all the malicious files from your computer.
   

   When the malware removal process is complete, it will display a screen that shows the status of the various programs that were removed. At this screen, you should click on the Next button and then if prompted you should click on the Reboot button. If HitmanPro does not prompt you to reboot, please just click on the Close button.

STEP 8: Use AdwCleaner to remove adware and malicious browser policies

In this final step, we will download and install AdwCleaner to remove the malicious browser policies that were set by browser hijackers on your computer and delete malicious browser extensions.

AdwCleaner is a free popular on-demand scanner that can detect and remove malware that even the most well-known anti-virus and anti-malware applications fail to find. This on-demand scanner includes a lot of tools that can be used to fix the side effects of adware. browser hijackers and other malware.

1. Download AdwCleaner.

   You can download AdwCleaner by clicking the link below.

   

   ADWCLEANER DOWNLOAD LINK
   (The above link will open a new web page from where you can download AdwCleaner)

2. Double-click on the setup file.

   Double-click on the file named “adwcleaner_x.x.x.exe” to start AdwCleaner. In most cases, downloaded files are saved to the Downloads folder.
   

   AdwCleaner program will now open and you will be presented with the program’s license agreement. After you read it, click on the I agree button if you wish to continue. If Windows prompts you as to whether or not you wish to run AdwCleaner, please allow it to run.

   

3. Enable “Reset Chrome policies” to remove malicious browser policies.

   When AdwCleaner starts, on the left side of the window, click on “Settings” and then enable “Reset Chrome policies“.

   

4. Click on the “Scan” button.

   On the left side of the AdwCleaner window, click on “Dashboard” and then click “Scan” to perform a computer scan.

   

5. Wait for the AdwCleaner scan to finish.

   AdwCleaner will now scan your computer for malware. This process can take a few minutes.

   

6. Click on “Quarantine” to remove malware.

   When the AdwCleaner scan is completed it will display all of the items it has found. Click on the “Quarantine” button to remove the malicious programs from your computer.

   

7. Click on “Continue” to remove the malicious programs.

   AdwCleaner will now prompt you to save any open files or data as the program will need to close any open programs before it starts to clean. Click on the “Continue” button to finish the removal process.
   

   AdwCleaner will now delete all detected malware from your computer. When the malware removal process is complete, you may be asked to restart your computer.

Your computer should now be free of the Chromstera Browser and other malicious programs. 

If your current antivirus allowed this malicious program on your computer, you may want to consider purchasing Malwarebytes Premium to protect against these types of threats in the future.
If you are still having problems with your computer after completing these instructions, then please follow one of the steps:

• Run a computer scan with ESET Online Scanner
• Ask for help in our Windows Malware Removal Help & Support forum.