Remove “Warning: System may have found viruses on your computer” Virus

“Warning: System may have found viruses on your computer” pop-up is a small program that is integrated into the system to be able to promote computer assistance service via phone number 1-855-807-4805. You may get this program by downloading and installing shareware applications or fake software update. By packing “Warning: System may have found viruses on your computer” applet into other software, developers are hoping to spread the service fast and easy. Unknown to user, program they have downloaded and installed will somehow corrupt the system by dropping an adware. So far, “Warning: System may have found viruses on your computer” is deemed as an adware and not a computer virus.

When “Warning: System may have found viruses on your computer” is installed, it will pop-up from the system tray at any given time, without the need be executed. The adware promotes mainly their “computer support” service, followed by a series of tools and programs, which it calls essential.

Aside from system tray, “Warning: System may have found viruses on your computer” also redirects all open browsers to various web sites showing the following messages:

Warning: System may have found viruses on your computer.
System May Have Found (2) Malicious Viruses: Rootkit.Sirefef.Spy and Trojan.FakeAV-Download. Your Personal & Financial Information MAY NOT BE SAFE.
For Help Removing Viruses, Call Tech Support Online Right Away: 1-855-807-4805

“Warning: System may have found viruses on your computer” pop-up may deceive you with false findings about computer errors or virus presence. Keep in mind that this is how the program can force you to use their online support assistance. The same method attempts to entice you in buying endorsed programs.

Screenshot of Fake Warning

If you are seeing “Warning: System may have found viruses on your computer” on the computer, it is still best to remove the adware using add/remove program of Windows. If not fully removed, utilize some tools to uninstall “Warning: System may have found viruses on your computer” adware completely.

"Warning: System may have found viruses on your computer" Removal Procedure

Below is a systematic instruction that is very useful in getting rid of the potentially unwanted program (PUP) from compromised Windows computer. Aside from removing the malicious browser extension, this guide is also helpful in deleting browser hijacker and pop-ups.

Remove "Warning: System may have found viruses on your computer" pop-ups and redirects by executing these steps:

Step 1 : Scan the PC with Combo Cleaner for Windows

Combo Cleaner is a trusted PC security and optimization tool equipped with a powerful virus and malware detection engine. This program can get rid of adware like "Warning: System may have found viruses on your computer" through this procedure.

1. Download the application from the following page:

2. Save the file to your preferred location.

3. Double-click the downloaded file CCSetup.exe and install with the default settings.

4. At the end of the setup process, click Finish to run Combo Cleaner.

5. The tool will update the database file; please wait for this process to complete.

6. To begin checking for threats like "Warning: System may have found viruses on your computer", click on the Start Scan button. Wait for this scan to finish.

Screenshot of Combo Cleaner PC

7. At the end of the scan process, click on Remove all threats to delete "Warning: System may have found viruses on your computer" hijacker, including all malicious objects from the computer.

To fully optimize the features of antivirus and privacy scanners, users may have to upgrade to the premium version.

Please continue with the succeeding removal procedures if you are comfortable manually getting rid of the threat and malicious items linked to it.

Step 2 : Delete Suspicious Browser Extension and Notifications

Normally, "Warning: System may have found viruses on your computer" pop-ups will start to bombard internet browser screen with pop-ups if web user was deceived to click “Allow” button that triggers the said website to send push notification. To stop "Warning: System may have found viruses on your computer" from showing the pop-ups, please execute the procedures below.

Google Chrome

Remove "Warning: System may have found viruses on your computer" from Google Chrome

1. On Google Chrome browser, type or copy and paste the following in the address bar and press Enter on the keyboard:

chrome://settings/content/notifications

2. Scroll down to the list under "Allowed to send notifications" section and look for "Warning: System may have found viruses on your computer".

3. Click ellipses icon (3-dot) beside "Warning: System may have found viruses on your computer" list to reveal the options.

Screenshot of Chrome Notification Settings

4. Click on Block or Remove to stop "Warning: System may have found viruses on your computer" from displaying pop-up ads on Google Chrome browser.

5. Please restart your Google Chrome browser.

Remove Malicious Extension from Google Chrome

1. Open the Google Chrome browser.

2. Input the strings below in the address bar and press Enter on the keyboard:

chrome://extensions/

Screenshot of Chrome Extensions in PC

3. Look for malicious browser extension and remove it from Google Chrome.

Alternative Method to Clean Up Google Chrome browser

Not all browser threats are the same. Some cannot be removed by deleting relevant extensions and codes. In this instance, resetting the browser to its default configuration is the best solution. If "Warning: System may have found viruses on your computer" is still bothering you after completing all the steps above, please execute the procedures below to proceed with the Google Chrome Safety Check.

1. Open the Google Chrome application.

2. Type or copy and paste the string below in the address bar. Then, press Enter on the keyboard:

chrome://settings/privacy

Screenshot of Safety Check

3. Next, please click the Go to Safety Check and review your current security status.

4. Remove any suspicious items and follow the safety recommendations of Google Chrome.

This feature of Google Chrome aims to find malicious websites and harmful software. If you are unable to delete "Warning: System may have found viruses on your computer", the other option is to Reset Google Chrome settings to their original defaults. See more details on this page.

Microsoft Edge

Get rid of "Warning: System may have found viruses on your computer" from Microsoft Edge

1. Open the Microsoft Edge browser. Type or copy and paste the following in the address bar and press Enter on your keyboard:

edge://settings/content/notifications

Screenshot of Edge Notifications

2. Scroll down to the Allow section and select "Warning: System may have found viruses on your computer".

3. Click the More Actions or ellipses icon (3-dot) to reveal the options.

4. Select Remove from the options to stop the malicious website from using the push notification feature. Repeat the same procedure for other websites that keep displaying pop-up advertisements.

Remove malicious extension from Microsoft Windows and Edge Browser

1. On your keyboard, press Windows Key + R. Type the appwiz.cpl command and click OK.

Screenshot of Run Command

2. The Program and Features window will open. Arrange the list in a chronological manner, with recently installed applications on top. To do this, click on the 'Installed On' column.

Screenshot of Program and Featires

3. Look for a malicious item or a recently installed suspicious entry in the list.

4. Click on Uninstall to remove it from the Windows system.

If "Warning: System may have found viruses on your computer" is still present on the browser and the pop-ups persist, another option is to remove relevant adware from the browser settings.

5. Open the Microsoft Edge program.

6. Input the following string in the address bar and press Enter on the keyboard:

edge://extensions/

Screenshot of MS Edge Address Bar

7. Look for and Remove or Disable malicious items from the Installed Extensions area.

Screenshot of Edge Extension Removal

8. You may now close the window and restart the Microsoft Edge browser.

Mozilla Firefox

Stop "Warning: System may have found viruses on your computer" pop-up on Mozilla Firefox

1. On Mozilla Firefox browser, type the following in the address bar and press Enter key:

about:preferences#privacy

2. Scroll down to the Permissions area and look for Notifications.

Screenshot of Firefox Notifications

3. Click the Settings button aligned with the Notifications.

4. Look for "Warning: System may have found viruses on your computer" entry and click the Remove WebsiteStatus button.

Screenshot of Firefox Notifications Removal

5. Click on Save Changes and restart Mozilla Firefox and check if "Warning: System may have found viruses on your computer" pop-up is gone.

Uninstall Malicious Extension from Mozilla Firefox

1. Open the Mozilla Firefox browser.

2. Type or copy and paste the strings below in the address bar and press Enter on the keyboard:

about:addons

Screenshot of Firefox Extension

3. Click on Extensions from the sidebar menu.

4. Look for an entry malicious extension and Disable or Remove it from the browser using the options button.

After deleting the malicious browser extension, it is expected that pop-ups and other troubles will be gone from the Mozilla Firefox browser.

Step 3 : Scan and Delete Adware with AdwCleaner

In addition to the procedure, we suggest scanning the computer with AdwCleaner tool. Possibly, there are some traces of "Warning: System may have found viruses on your computer" on the browser that was not deleted during the preceding steps. This tool will scan the computer and check for presence of malicious applications.

1. Follow the link below to download the tool called AdwCleaner.

2. When the download has completed, please close all running programs on the computer, especially browsers affected by "Warning: System may have found viruses on your computer".

3. Browse the location of the downloaded file and double-click on adwcleaner.exe to start running the tool.

4. If Windows displays a prompt saying, "Do you want to allow this app to make changes to your device?" click Yes to proceed.

5. On the AdwCleaner dashboard, click on Settings.

Screenshot of AdwCleaner Policies

6. While in the Settings window, please turn On the Reset Chrome Policies and Reset IE Policies.

Screenshot of AdwCleaner Scanner

7. Go back to the Dashboard and click the Scan Now button.

8. AdwCleaner searches the computer for malicious programs, extensions, plug-ins, adware, and any items that may be associated with "Warning: System may have found viruses on your computer".

9. Clean or Remove all suspicious and harmful items identified after the thorough scan.

10. After the cleanup procedure, rebooting the computer is required to finalize the removal of detected threats.

Check if your internet browser application is no longer being bothered by "Warning: System may have found viruses on your computer" pop-up. If the browser hijacker still persists, please continue with the steps below to reset internet programs to default settings.

Optional : Reset Internet Browser Program

Cleaning your internet browser from clutter and unwanted add-on/extension is a must when dealing with "Warning: System may have found viruses on your computer". The procedure below discusses on resetting various browsers to their default state.

Restore Google Chrome to Default Settings

Resetting Google Chrome to its default settings is helpful in deleting hard-to-remove extensions. This method is highly advisable to perform if you have difficulty removing unwanted extensions.

1. Open the Google Chrome internet browser.
2. On the address bar, type chrome://settings/reset and press the Enter key.
3. Click on Reset Settings on the sidebar and choose Restore settings to their original defaults.
4. On the confirmation window, click the Reset settings button to clear all malicious entries.
5. Close the existing tab and restart Google Chrome. That should have removed the malicious extension and associated objects.

Reset Mozilla Firefox to Default

This section describes how to remove unwanted extensions from Firefox that may be related to "Warning: System may have found viruses on your computer". This process can fix many browser issues by restoring Firefox to factory settings without affecting your essential information (bookmarks, browsing history, passwords, and Internet cookies) on the browser. If you desire to remove only a specific extension, please see the manual removal of add-ons from Firefox.

1. Input the string about:support on the Firefox web address and press Enter on the keyboard.
2. You will now see the Troubleshooting Information page of Mozilla Firefox.
3. You will notice a section in the upper-right corner of the screen stating, Give Firefox a tune-up. Click the Refresh Firefox button.
4. If a confirmation window appears, click Refresh Firefox to continue.
5. Firefox browser will close and start the resetting process. When done, it will display a list of restored data. "Warning: System may have found viruses on your computer" should be gone by now. Click Finish to open a fresh version of Firefox.

Restore Microsoft Edge to Default Settings

1. Open the Microsoft Edge browser.
2. On the address bar, please input edge://settings/reset and press Enter on the keyboard.
3. Once you are on the Reset Settings page, click on Restore settings to their default values.
4. A confirmation window will appear; click on the Reset button to continue.

Your data, like favorites, bookmarks, and history, will remain in the browser. However, this process will delete add-ons by "Warning: System may have found viruses on your computer" and other unknown objects.

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