Serch21.biz is a site that tries to trick you into subscribing to its browser notifications so that it can send notification spam directly to your desktop or phone.
What is Serch21.biz?
Serch21.biz is a malicious site that displays fake error messages to trick you into subscribing to its browser notifications. This is the fake error message that the Serch21.biz site will display:
Serch21.biz wants to Show notifications
Press Allow to watch the video
You should not click on the Allow button when you see such messages. If you click on the “Allow” button, you will start seeing spam pop-ups from Serch21.biz on your computer or phone, even when the browser is closed. The Serch21.biz malicious push notifications are for adult sites, online web games, fake software updates, and unwanted programs.
This is how the Serch21.biz pop-up ads will look on a Windows 10 computer:
Why am I seeing the Serch21.biz pop-up ads?
You are seeing the Serch21.biz advertisements because your computer is infected with a malicious program or a site that you have visited has redirected your browser to this page.
Less than reputable sites can display malicious ads that pop-up ads your browser to the Serch21.biz pop-up ads to generate advertising revenue. If this happens, you can close the page and install an ad blocker like AdGuard to block the malicious ads. However, if you continuously see pop-ups like Serch21.biz pop-up ads, then your computer might be infected with a malicious program, and you need to scan your device for adware and remove it.
Here are a few typical signs that you have a malicious program installed on your computer:
- Advertisements appear in places they shouldn’t be.
- Your web browser’s homepage has mysteriously changed without your permission.
- Web pages that you typically visit are not displaying properly.
- Website links pop-up ads to sites different from what you expected.
- Browser popups appear which recommend fake updates or other software.
- Other unwanted programs might get installed without your knowledge.
To check your computer for the Serch21.biz adware and remove it for free, please use the guide below.
Remove Serch21.biz pop-up ads (Virus Removal Guide)
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.
Depending on which operating system is installed on the device you’re seeing the Serch21.biz pop-up ads, follow the removal guide.
Remove Serch21.biz pop-up ads from Windows- Remove Serch21.biz pop-up ads from Mac
- Remove Serch21.biz pop-up ads from Android
Remove Serch21.biz pop-up ads from Windows
Remove Serch21.biz pop-up ads from Mac
Remove Serch21.biz pop-up ads from Android- STEP 1: Remove the Serch21.biz pop-up ads from your Windows browser
- STEP 2: Use Malwarebytes Free to remove Serch21.biz adware
STEP 1: Remove the Serch21.biz pop-up ads from your Windows browser
In this first step, we will remove the Serch21.biz permission to send pop-up notifications to your desktop. Depending on which browser are you seeing the Serch21.biz pop-up ads, click on the below browser tab.
Remove Serch21.biz pop-up ads from Google Chrome
If you’re using Google Chrome on a Windows or Mac computer, you can use the below steps to remove the Serch21.biz permission to send pop-up notifications:
- In the top right corner, click “More” (three vertical dots), then click on “Settings”.
- In the Privacy and Security section, click on “Site settings“.
- Click on “Notifications“.
- Find the Serch21.biz site and click the three vertical dots button, then click on “Remove”.
Remove Serch21.biz pop-up ads from Firefox
- In the top right corner, click on Firefox’s main menu button, represented by three horizontal lines.
- When the drop-down menu appears, select the option labeled “Options”.
- Click on “Privacy & Security” on the left side of the window.
- Scroll down to the Permissions section and click on the “Settings…” button next to Notifications.
- Find the Serch21.biz site, then click on the drop-down menu and select “Block”.
- Click on the “Save Changes” button.
Remove Serch21.biz pop-up ads from Microsoft Edge
- In the top right corner, click on the three dots to expand the Edge menu.
- When the drop-down menu appears, select the option labeled Settings.
- On the left side of the window, click on “Cookies and site permissions”.
- Click on the “Notifications“.
- Find the Serch21.biz site and click the three horizontal dots button next to it, then click on “Remove”.
Remove Serch21.biz pop-up ads from Internet Explorer
To remove the Serch21.biz pop-up ads from Internet Explorer we will reset the browser settings to its default. You can reset Internet Explorer settings to return them to the state they were in when Internet Explorer was first installed on your computer.
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Go to “Internet Options”.
Open Internet Explorer, click on the gear icon in the upper right part of your browser, then select “Internet Options“.
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Select the “Advanced” tab, then click “Reset”
In the “Internet Options” dialog box, select the “Advanced” tab, then click on the “Reset” button.
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Click on “Reset”.
In the “Reset Internet Explorer settings” section, select the “Delete personal settings” checkbox, then click on the “Reset” button.
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Click on “Close”.
When Internet Explorer has completed its task, click on the “Close” button in the confirmation dialogue box.
Close your browser and then you can open Internet Explorer again.
STEP 2: Use Malwarebytes Free to remove Serch21.biz adware
In this second step, we will install Malwarebytes to scan and remove the Serch21.biz browser hijackers from your computer.
Malwarebytes Free is one of the most popular and most used anti-malware software for Windows, and for good reasons. It is able to destroy many types of malware that other software tends to miss without costing you absolutely nothing. When it comes to cleaning up an infected device, Malwarebytes has always been free, and we recommend it as an essential tool in the fight against malware.
It is important to note that Malwarebytes Free will run alongside antivirus software without conflicts.
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Download Malwarebytes Free.
You can download Malwarebytes by clicking the link below.
MALWAREBYTES DOWNLOAD LINK
(The above link will open a new page from where you can download Malwarebytes) -
Double-click on the Malwarebytes setup file.
When Malwarebytes has finished downloading, double-click on the MBSetup file to install Malwarebytes on your computer. In most cases, downloaded files are saved to the Downloads folder.
You may be presented with an User Account Control pop-up asking if you want to allow Malwarebytes to make changes to your device. If this happens, you should click “Yes” to continue with the Malwarebytes installation.
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Follow the on-screen prompts to install Malwarebytes.
When the Malwarebytes installation begins, you will see the Malwarebytes setup wizard which will guide you through the installation process. The Malwarebytes installer will first ask you on what type of computer are you installing this program, click either Personal Computer or Work Computer.
On the next screen, click “Install” to install Malwarebytes on your computer.
When your Malwarebytes installation completes, the program opens to the Welcome to Malwarebytes screen. Click the “Get started” button.
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Select “Use Malwarebytes Free”.
After installing Malwarebytes, you’ll be prompted to select between the Free and the Premium version. The Malwarebytes Premium edition includes preventative tools like real-time scanning and ransomware protection; however, we will use the Free version to clean up the computer.
Click on “Use Malwarebytes Free“.
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Click on “Scan”.
To scan your computer with Malwarebytes, click on the “Scan” button. Malwarebytes will automatically update the antivirus database and start scanning your computer for malware.
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Wait for the Malwarebytes scan to complete.
Malwarebytes will scan your computer for adware and other malicious programs. This process can take a few minutes, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.
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Click on “Quarantine”.
When the scan has completed, you will be presented with a screen showing the malware infections that Malwarebytes has detected. To remove the malicious programs that Malwarebytes has found, click on the “Quarantine” button.
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Restart computer.
Malwarebytes will now remove all the malicious files and registry keys that it has found. To complete the malware removal process, Malwarebytes may ask you to restart your computer.
When the malware removal process is complete, you can close Malwarebytes and continue with the rest of the instructions.
Your computer should now be free of the Serch21.biz pop-up ads. If your current antivirus allowed this malicious program on your computer, you might 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.
To remove the Serch21.biz pop-up ads from macOS, follow these steps:
- STEP 1: Remove Serch21.biz pop-up ads your Mac browser
- STEP 2: Use Malwarebytes for Mac to remove Serch21.biz adware
STEP 1: Remove Serch21.biz pop-up ads your Mac browser
If you’re using a macOS device rather than Windows, in this first step we will remove the Serch21.biz pop-ups from your browser. Depending on which browser are you seeing the Serch21.biz pop-up ads, click on the below browser tab.
Remove Serch21.biz pop-up ads from Safari browser
- Open Safari. In the top left corner, click on Safari.
- Go to Preferences in the Safari menu, now open the Websites tab.
- In the left menu click on Notifications.
- Find the Serch21.biz site and select it, click the Deny button.
- Open Firefox
- In the top-right corner, click the Firefox menu (three horizontal stripes).
- In the menu go to Options, in the list on the left go to Privacy & Security.
- Scroll down to Permissions and then to Settings next to Notifications.
- Select the Serch21.biz URL from the list, and change the status to Block, save Firefox changes.
- Open Google Chrome.
- In the top-right corner, expand the Chrome menu.
- In the Google Chrome menu, open Settings.
- At the Privacy and Security section, click Site settings.
- Open the Notifications settings.
- Remove Serch21.biz by clicking the three dots on the right next to the Serch21.biz URL and click Remove.
STEP 2: Use Malwarebytes for Mac to remove Serch21.biz adware
In this second step, we will install Malwarebytes to scan and remove the Serch21.biz browser hijackers from your Mac computer.
Malwarebytes for Mac is one of the most popular and most used anti-malware software for Windows, and for good reasons. It is able to destroy many types of malware that other software tends to miss, without costing you absolutely nothing. When it comes to cleaning up an infected device, Malwarebytes has always been free and we recommend it as an essential tool in the fight against malware.
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Download Malwarebytes Free.
You can download Malwarebytes for Mac by clicking the link below.
MALWAREBYTES FOR MAC DOWNLOAD LINK
(The above link will open a new page from where you can download Malwarebytes for Mac) -
Double-click on the Malwarebytes setup file.
When Malwarebytes has finished downloading, double-click on the setup file to install Malwarebytes on your computer. In most cases, downloaded files are saved to the Downloads folder.
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Follow the on-screen prompts to install Malwarebytes.
When the Malwarebytes installation begins, you will see the Malwarebytes for Mac Installer which will guide you through the installation process. Click “Continue“, then keep following the prompts in order to continue with the installation process.
When your Malwarebytes installation completes, the program opens to the Welcome to Malwarebytes screen. Click the “Get started” button.
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Select “Personal Computer” or “Work Computer”.
The Malwarebytes Welcome screen will first ask you on what type of computer are you installing this program, click either Personal Computer or Work Computer.
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Select “Use Malwarebytes Free”.
You’ll be then prompted to select between the Malwarebytes Free and the Premium version. The Malwarebytes Premium edition includes preventative tools like real-time scanning and ransomware protection, however, we will use the Free version to clean up the computer.
Click on “Use Malwarebytes Free“.
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Click on “Scan”.
To scan your computer with Malwarebytes, click on the “Scan” button. Malwarebytes will automatically update the antivirus database and start scanning your computer for malware.
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Wait for the Malwarebytes scan to complete.
Malwarebytes will scan your computer for pop-up ads and other malicious programs. This process can take a few minutes, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.
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Click on “Quarantine”.
When the scan has completed, you will be presented with a screen showing the malware infections that Malwarebytes has detected. To remove the malicious programs that Malwarebytes has found, click on the “Quarantine” button.
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Restart computer.
Malwarebytes will now remove all the malicious files that it has found. To complete the malware removal process, Malwarebytes may ask you to restart your computer.
When the malware removal process is complete, you can close Malwarebytes and continue with the rest of the instructions.
Your computer should now be free of the Serch21.biz pop-up ads. If your current antivirus allowed a malicious program on your computer, you might want to consider purchasing Malwarebytes Premium to protect against these types of threats in the future.
If you are still experiencing problems while trying to a malicious program from your computer, please ask for help in our Mac Malware Removal Help & Support forum.
To remove the Serch21.biz pop-up ads from Android, follow these steps:
- STEP 1: Remove the Serch21.biz pop-up ads from your Android browser
- STEP 2: Use Malwarebytes for Android to remove Serch21.biz adware
STEP 1: Remove the Serch21.biz pop-up ads from your Android browser
In this first step, we will remove the Serch21.biz permissions to send notofications to your phone browser. Depending on which browser are you seeing the Serch21.biz pop-up ads, click on the below browser tab.
Remove Serch21.biz pop-up ads from Chrome for Android
- On your Android phone, open Google Chrome
- In the top right corner, tap “More” (three vertical dots), then click on “Settings”.
- Chrome’s “Settings” menu should now be displayed, scroll down to the “Advanced” section, and tap on “Site Settings“.
- In the “Site Settings” menu, tap on “Notifications“.
- The “Notifications” options will open and you will be presented with a list of sites that you have “Blocked” and “Allowed” to send you notifications. In the “Allowed” section, scroll through the list until you find the Serch21.biz site, then tap on it, then click the “Clean & Reset” button that appears on the bottom of the window.
- A confirmation dialog should now be displayed, detailing the actions that will be taken should you continue on with the reset process. To complete the clean-up process, click on the “Clean & Reset” button.
Remove Serch21.biz pop-up ads from Firefox
To remove the Serch21.biz advertisements from Firefox we will reset the browser settings to its default. This will remove all the cookies, cache, and other site settings that may have been saved.
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Open the “Settings” menu.
Tap on the “Settings” app from your phone menu or home screen.
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Tap on “Apps”.
When the “Settings” menu opens, tap on “Apps” (or “App Manager”) to see all the installed applications on your phone.
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Find and tap on Firefox.
The “Apps” screen will be displayed with a list of all the apps installed on your phone. Scroll through the list until you find the Firefox app, then tap on it to open the apps details.
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Tap “Storage”.
When the Firefox’s app info menu is displayed, tap on “Storage“.
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Tap “Manage Space”.
Under the storage settings, you will get two options — Manage Space and Clear Cache. Tap on “Manage Space“.
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Tap “Clear all data”.
Tap “Clear all data” to delete all Firefox’s data including accounts, bookmarks and your settings in order to reset the default settings.
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Confirm by tapping “Ok”.
A confirmation dialog should now be displayed, detailing the components that will be restored to their default state should you continue on with the reset process. To complete the restoration process, tap “Ok“.
Remove Serch21.biz pop-up ads from Opera
To remove the Serch21.biz advertisements from Opera browser we will reset the browser settings to its default. This will remove all the cookies, cache, and other site settings that may have been saved.
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Open the “Settings” menu.
Tap on the “Settings” app from your phone menu or home screen.
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Tap on “Apps”.
When the “Settings” menu opens, tap on “Apps” (or “App Manager”) to see all the installed applications on your phone.
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Find and tap on Opera.
The “Apps” screen will be displayed with a list of all the apps installed on your phone. Scroll through the list until you find the Opera app, then tap on it to open the apps details.
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Tap “Storage”.
When the Opera’s app info menu is displayed, tap on “Storage“.
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Tap “Manage Space”.
Under the storage settings, you will get two options — Manage Space and Clear Cache. Tap on “Manage Space“.
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Tap “Clear all data”.
Tap “Clear all data” to delete all Opera’s data including accounts, bookmarks and your settings in order to reset the default settings.
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Confirm by tapping “Ok”.
A confirmation dialog should now be displayed, detailing the components that will be restored to their default state should you continue on with the reset process. To complete the restoration process, tap “Ok“.
Remove Serch21.biz pop-up ads from Brave
To remove the Serch21.biz advertisements from Brave browser we will reset the browser settings to its default. This will remove all the cookies, cache, and other site settings that may have been saved.
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Open the “Settings” menu.
Tap on the “Settings” app from your phone menu or home screen.
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Tap on “Apps”.
When the “Settings” menu opens, tap on “Apps” (or “App Manager”) to see all the installed applications on your phone.
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Find and tap on Brave.
The “Apps” screen will be displayed with a list of all the apps installed on your phone. Scroll through the list until you find the Brave app, then tap on it to open the apps details.
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Tap “Storage”.
When the Brave’s app info menu is displayed, tap on “Storage“.
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Tap “Manage Space”.
Under the storage settings, you will get two options — Manage Space and Clear Cache. Tap on “Manage Space“.
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Tap “Clear all data”.
Tap “Clear all data” to delete all Brave’s data including accounts, bookmarks, and your settings in order to reset the default settings.
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Confirm by tapping “Ok”.
A confirmation dialog should now be displayed, detailing the components that will be restored to their default state should you continue on with the reset process. To complete the restoration process, tap “Ok“.
Remove Serch21.biz pop-up ads from Samsung Internet Browser
To remove the Serch21.biz advertisements from Samsung Internet Browser we will reset the browser settings to its default. This will remove all the cookies, cache, and other site settings that may have been saved.
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Open the “Settings” menu.
Tap on the “Settings” app from your phone menu or home screen.
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Tap on “Apps”.
When the “Settings” menu opens, tap on “Apps” (or “App Manager”) to see all the installed applications on your phone.
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Find and tap on Samsung Internet Browser.
The “Apps” screen will be displayed with a list of all the apps installed on your phone. Scroll through the list until you find the Samsung Internet Browser app, then tap on it to open the apps details.
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Tap “Storage”.
When the Samsung Internet Browser’s app info menu is displayed, tap on “Storage“.
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Tap “Manage Space”.
Under the storage settings, you will get two options — Manage Space and Clear Cache. Tap on “Manage Space“.
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Tap “Clear all data”.
Tap “Clear all data” to delete all Samsung Internet Browser’s data including accounts, bookmarks, and your settings in order to reset the default settings.
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Confirm by tapping “Ok”.
A confirmation dialog should now be displayed, detailing the components that will be restored to their default state should you continue on with the reset process. To complete the restoration process, tap “Ok“.
Remove Serch21.biz pop-up ads from Microsoft Edge
To remove the Serch21.biz advertisements from Microsoft Edge we will reset the browser settings to its default. This will remove all the cookies, cache, and other site settings that may have been saved.
-
Open the “Settings” menu.
Tap on the “Settings” app from your phone menu or home screen.
-
Tap on “Apps”.
When the “Settings” menu opens, tap on “Apps” (or “App Manager”) to see all the installed applications on your phone.
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Find and tap on Microsoft Edge.
The “Apps” screen will be displayed with a list of all the apps installed on your phone. Scroll through the list until you find the Microsoft Edge app, then tap on it to open the apps details.
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Tap “Storage”.
When the Microsoft Edge’s app info menu is displayed, tap on “Storage“.
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Tap “Manage Space”.
Under the storage settings, you will get two options — Manage Space and Clear Cache. Tap on “Manage Space“.
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Tap “Clear all data”.
Tap “Clear all data” to delete all Microsoft Edge’s data including accounts, bookmarks, and your settings in order to reset the default settings.
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Confirm by tapping “Ok”.
A confirmation dialog should now be displayed, detailing the components that will be restored to their default state should you continue on with the reset process. To complete the restoration process, tap “Ok“.
STEP 2: Use Malwarebytes for Android to remove Serch21.biz adware
In this second step, we will install Malwarebytes to scan and remove the Serch21.biz browser hijackers from your phone.
Malwarebytes Free is one of the most popular and most used anti-malware software for Windows, and for good reasons. It is able to destroy many types of malware that other software tends to miss, without costing you absolutely nothing. When it comes to cleaning up an infected phone, Malwarebytes has always been free and we recommend it as an essential tool in the fight against malware.
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Download Malwarebytes.
You can download Malwarebytes by clicking the link below.
MALWAREBYTES DOWNLOAD LINK
(The above link open a Google Play Store from where you can download Malwarebytes) -
Install Malwarebytes on your phone
In the Google Play Store, tap “Install” to install Malwarebytes on your device.
When the installation process has finished, tap “Open” to begin using Malwarebytes for Android. You can also open Malwarebytes by tapping on its icon in your phone menu or home screen.
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Follow the on-screen prompts to complete the setup process
When the Malwarebytes will open, you will see the Malwarebytes Setup Wizard which will guide you through a series of permissions and other setup options.
This is the first of two screens which explain the difference between the Premium and Free version. Swipe this screen to continue.
Tap on “Got it” to proceed to the next step.
Malwarebytes for Android will now ask for a set of permissions that are required to scan your device and protect it from malware. Tap on “Give permission” to continue.
Tap on “Allow” to give permission to Malwarebytes to access the files on your phone.
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Update database and run a scan with Malwarebytes
You will now be prompted to update the Malwarebytes database and run a full system scan.
Click on “Update database” to update the Malwarebytes definitions to the latest version, then click on “Run full scan” to perform a system scan.
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Wait for the Malwarebytes scan to complete.
Malwarebytes will now start scanning your phone for adware and other malicious apps. This process can take a few minutes, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.
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Click on “Remove Selected”.
When the scan has completed, you will be presented with a screen showing the malware infections that Malwarebytes has detected. To remove the malicious apps that Malwarebytes has found, tap on the “Remove Selected” button.
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Restart your phone.
Malwarebytes will now remove all the malicious apps that it has found. To complete the malware removal process, Malwarebytes may ask you to restart your device.
Your computer should now be free of the Serch21.biz pop-up ads. If your current antivirus allowed a malicious app on your phone, you might want to consider purchasing Malwarebytes Premium to protect against these types of threats in the future.
If you are still experiencing problems while trying to remove a malicious program from your computer, please ask for help in our Mobile Malware Removal Help & Support forum.
