Remove “BSOD: DllRegisterServer failed” pop-up virus (Support Scam)

If you are seeing random pop-ups stating that BSOD : DllRegisterServer failed with the error code 0x80040201 and ask you to call for debug “support”, then your computer is infected with an adware or a potentially unwanted program.
BSOD DllRegisterServer failed virus

The BSOD : DllRegisterServer failed with the error code 0x80040201 pop-ups are caused by an ad-supported extension for Internet Explorer, Firefox and Chrome, which is distributed through various monetization platforms during installation. The malicious browser extensions is typically added when you install another free software (video recording/streaming, download-managers or PDF creators) that had bundled into their installation this adware program.
When an adware extension is installed on your computer, whenever you will open a new tab within Internet Explorer, Firefox and Google Chrome, an ad from BSOD : DllRegisterServer failed with the error code 0x80040201 will pop-up. The BSOD : DllRegisterServer failed with the error code 0x80040201 pop-up ad will state that you computer is infected and that you need to call their paid support service to remove the infection. This is a bogus claim, and an attempt to make you pay $199 for their malware removal “services”. The BSOD : DllRegisterServer failed with the error code 0x80040201 pop-up will have the following message:

BSOD : DllRegisterServer failed with the error code 0x80040201

Windows Defender Error Code: 0x80073afc

0x000000CE DRIVER_UNLOADED_WITHOUT_CANCELLING_PENDING_OPERATIONS

Error Code 0x800705b4 when Starting Windows Defender

Windows Defender Time Out Error code 0x800705b4.

Error code 0x800705b4 when trying to open Windows Defender

Windows health is CRITICAL!

Please Contact Help Desk: +1-866-261-2971 (Toll-Free)

Other common symptoms include may include:

  • Advertising banners are injected with the web pages that you are visiting.
  • Random web page text is turned into hyperlinks.
  • Browser popups appear which recommend fake updates or other software.
  • Other unwanted adware programs might get installed without the user’s knowledge.

As you can see, this program was created for the sole purpose of displaying fake Windows alerts in order to scare you into purchasing remote support services. If you are infected with this program, please ignore any alerts that are displayed and do not call the displayed number. To remove this Trojan and any related software, please use the removal guide below.

How to remove BSOD : DllRegisterServer failed pop-ups (Removal Guide)

This page is a comprehensive guide which will remove BSOD : DllRegisterServer failed pop-ups from Windows.
Please perform all the steps in the correct order. If you have any questions or doubt at any point, STOP and ask for our assistance.

To remove BSOD: DllRegisterServer failed pop-ups, follow these steps:
STEP 1: Scan your computer with AdwCleaner
STEP 2: Scan your computer with Malwarebytes Anti-Malware
STEP 3: Scan your computer with HitmanPro
(OPTIONAL) STEP 4: Scan your computer with Zemana AntiMalware
(OPTIONAL) STEP 5: Reset your browser to default settings

OPTIONAL: Remove the BSOD : DllRegisterServer failed with the error code 0x80040201 pop-up

This step needs to be performed only if the malicious pop-ups will not allow you to close your browser.

  1. Open Task Manager by right-clicking the taskbar, and then clicking Start Task Manager. Alternatively to start the Windows Task Mager, you can press Ctrl+Alt+Del and click on Task Manager or simply press on Ctrl+Shift+Esc.
    Start Windows Task Manager
  2. Scroll through the list till you see your web browser’s process and left-click on it once so it becomes highlighted. Once you have selected the browser’s process, click on the End Task button as show in the picture below.
    Task Manager Pop-up
  3. Your browser window should now be closed. The next time you open your browser, do not allow the browser to open the last opened page.

Alternatively, if you are using Microsoft Edge or any other browser, you can disconnect your Internet, then open the web browser, navigate away from the malicious web page, then reconnect to the Internet.


STEP 1: Scan your computer with AdwCleaner

AdwCleaner is a free utility, which will scan your computer and web browser for the BSOD : DllRegisterServer failed redirect.

  1. You can download AdwCleaner from the below link.
    ADWCLEANER DOWNLOAD LINK (This link will open a new web page from where you can download “AdwCleaner”)
  2. Before starting AdwCleaner, close your web browser, then double-click on the AdwCleaner icon.
    AdwCleaner Icon
    If Windows prompts you as to whether or not you wish to run AdwCleaner, please allow it to run.
    AdwCleaner UAC
  3. When the AdwCleaner program will open, click on the “Scan” button as shown below.
    AdwCleaner Scan for Adware
    AdwCleaner will now start to search for the BSOD : DllRegisterServer failed adware and other malicious programs.
  4. To remove the malicious files that were detected in the previous step, please click on the “Clean” button.
    AdwCleaner removing malware
  5. AdwCleaner will prompt you to save any open files or documents, as the program will need to reboot the computer to complete the cleaning process. Please do so, and then click on the “OK” button.
    AdwCleaner Restart PC
    When your computer reboots and you are logged in, AdwCleaner will automatically open a log file that contains the files, registry keys, and programs that were removed from your computer. Please review this log file and then close the notepad window.

STEP 2: Scan your computer with Malwarebytes Anti-Malware

Malwarebytes Anti-Malware is a powerful on-demand scanner which will remove the BSOD : DllRegisterServer failed pop-ups from your machine. It is important to note that Malwarebytes Anti-Malware will run alongside antivirus software without conflicts.

  1. You can download download Malwarebytes Anti-Malware from the below link.
    MALWAREBYTES ANTI-MALWARE DOWNLOAD LINK (This link will open a new web page from where you can download “Malwarebytes Anti-Malware”)
  2. Once downloaded, close all programs, then double-click on the icon on your desktop named “mbam-setup” to start the installation of Malwarebytes Anti-Malware.
    Malwarebytes Anti-Malware Icon
    You may be presented with a User Account Control dialog asking you if you want to run this file. If this happens, you should click “Yes” to continue with the installation.
    Windows asking permission to install Malwarebytes
  3. When the installation begins, you will see the Malwarebytes Anti-Malware Setup Wizard which will guide you through the installation process.
    Malwarebytes Anti-Malware Setup Wizard
    To install Malwarebytes Anti-Malware on your machine, keep following the prompts by clicking the “Next” button.
    Malwarebytes Anti-Malware setup wizard
  4. Once installed, Malwarebytes Anti-Malware will automatically start and will update the antivirus database. To start a system scan you can click on the “Scan Now” button.
    Start a scan with Malwarebytes scan
  5. Malwarebytes Anti-Malware will now start scanning your computer for the BSOD : DllRegisterServer failed malware. When Malwarebytes Anti-Malware is scanning it will look like the image below.
    Malwarebytes Anti-Malware scanning for malware
  6. When the scan has completed, you will be presented with a screen showing the malware infections that Malwarebytes Anti-Malware has detected. To remove the malicious programs that Malwarebytes Anti-malware has found, click on the “Remove Selected” button.
    To remove malware click on the Remove Selected button
  7. Malwarebytes Anti-Malware will now quarantine all the malicious files and registry keys that it has found. When removing the files, Malwarebytes Anti-Malware may require a reboot in order to remove some of them. If it displays a message stating that it needs to reboot your computer, please allow it to do so.

STEP 3: Scan your computer with HitmanPro

HitmanPro finds and removes malware, adware, bots, and other threats that even the best antivirus suite can oftentimes miss. It’s designed to run alongside your antivirus suite, firewall, and other security tools.

  1. You can download HitmanPro from the below link:
    HITMANPRO DOWNLOAD LINK (This link will open a new web page from where you can download “HitmanPro”)
  2. Double-click on the file named “HitmanPro.exe” (for 32-bit versions of Windows) or “HitmanPro_x64.exe” (for 64-bit versions of Windows).
    HitmanPro Icon
    Click on the “Next” button, to install HitmanPro on your computer.
    HitmanPro setup process
  3. HitmanPro will now begin to scan your computer for malware.
    HitmanPro scanning for BSOD : DllRegisterServer failed virus
  4. When it has finished it will display a list of all the malware that the program found as shown in the image below. Click on the “Next” button, to remove malware.
    HitmanPro detected malware
  5. Click on the “Activate free license” button to begin the free 30 days trial, and remove all the malicious files from your computer.
    Activate HitmanPro to remove malware

(OPTIONAL) STEP 4: Scan your computer with Zemana AntiMalware

Zemana AntiMalware is a powerful utility which will remove BSOD : DllRegisterServer failed redirect and other malware from your machine.
This step should be performed only if your issues have not been solved by the previous steps.

  1. You can download Zemana AntiMalware from the below link:
    ZEMANA ANTIMALWARE DOWNLOAD LINK (This link will start the download of “Zemana AntiMalware”)
  2. Double-click on the file named “Zemana.AntiMalware.Setup.exe” to start the installation of Zemana AntiMalware.
    Double-click on the Zemana AntiMalware to instal it
    You may be presented with a User Account Control dialog asking you if you want to run this file. If this happens, you should click “Yes” to continue with the installation.
    Zemana AntiMalware UAC
  3. Click on the “Next” button, to install Zemana AntiMalware on your computer.
    Zemana AntiMalware installation
  4. When Zemana AntiMalware will start, click on the “Scan” button.
    Scan computer with Zemana AntiMalware
  5. Zemana AntiMalware will now scan computer for malicious files. This process can take up to 10 minutes.
    Zemana AntiMalware performing a scan
  6. When Zemana AntiMalware has finished it will display a list of all the malware that the program found. Click on the “Next” button, to remove the malicious files from your computer.
    Zemana AntiMalware removing malware
    Zemana AntiMalware will now remove all the detected malicious files, and at the end a system reboot may be required to remove all traces of malware.

(OPTIONAL) STEP 5: Reset your browser to default settings

If you are still experiencing issues with the BSOD : DllRegisterServer failed browser hijacker in Internet Explorer, Firefox or Chrome, we will need to reset your browser to its default settings.
This step should be performed only if your issues have not been solved by the previous steps.

Internet Explorer


You can reset Internet Explorer settings to return them to the state they were in when Internet Explorer was first installed on your PC.

  1. Open Internet Explorer, click on the “gear iconIE Icon Gear in the upper right part of your browser, then click again on Internet Options.
    [Image: Internet Options in Internet Explorer]
  2. In the “Internet Options” dialog box, click on the “Advanced” tab, then click on the “Reset” button.
    [Image: Reset Internet Explorer]
  3. In the “Reset Internet Explorer settings” section, select the “Delete personal settings” check box, then click on “Reset” button.
    [Image: Reset Internet Explorer to its default settings]
  4. When Internet Explorer has completed its task, click on the “Close” button in the confirmation dialogue box. You will now  need to close your browser, and then you can open Internet Explorer again.
    [Image Reset Internet Explorer settings]

Mozilla Firefox


If you’re having problems with Firefox, resetting it can help. The reset feature fixes many issues by restoring Firefox to its factory default state while saving your essential information like bookmarks, passwords, web form auto-fill information, browsing history and open tabs.

  1. In the upper-right corner of the Firefox window, click the Firefox menu button ([Image: Firefox Menu button]), then click on the “Help” ([Image: Firefox Help button]) button.
    Firefox Help button
  2. From the Help menu, choose Troubleshooting Information.
    If you’re unable to access the Help menu, type about:support in your address bar to bring up the Troubleshooting information page.
    Troubleshooting Information in Firefox
  3. Click the “Refresh Firefox” button in the upper-right corner of the “Troubleshooting Information” page.
    Refresh Firefox button
  4. To continue, click on the “Refresh Firefox” button in the new confirmation window that opens.
    Reset Firefox settings to default
  5. Firefox will close itself and will revert to its default settings. When it’s done, a window will list the information that was imported. Click on the “Finish“.

Note: Your old Firefox profile will be placed on your desktop in a folder named “Old Firefox Data“. If the reset didn’t fix your problem you can restore some of the information not saved by copying files to the new profile that was created. If you don’t need this folder any longer, you should delete it as it contains sensitive information.

Google Chrome


Google Chrome has an option that will reset itself to its default settings. Resetting your browser settings will reset the unwanted changes caused by installing other programmes. However, your saved bookmarks and passwords will not be cleared or changed.

  1. Click on Chrome’s main menu button, represented by three horizontal lines ([Image: Chrome's main menu button]). When the drop-down menu appears, select the option labeled Settings.
    Click on Settings
  2. Chrome’s Settings should now be displayed in a new tab or window, depending on your configuration. Next, scroll to the bottom of the page and click on the Show advanced settings link (as seen in the below example).
    Advanced settings Google Chrome
  3. Chrome’s advanced Settings should now be displayed. Scroll down until the Reset browser settings section is visible, as shown in the example below. Next, click on the Reset browser settings button.
    Reset button in Google Chrome
  4. 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, click on the Reset button.
    Restore Google Chrome to default settings

Your computer should now be free of the BSOD : DllRegisterServer failed pop-ups. You can remove AdwCleaner from your machine, however we recommend that you keep Malwarebytes Anti-Malware and HitmanPro installed and perform regular computer scans.

If you are still experiencing problems while trying to remove BSOD : DllRegisterServer failed redirect from your machine, please start a new thread in our Malware Removal Assistance forum.

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STELIAN PILICI
I've started MalwareTips in 2010 to help people solve their computer problems. My area of expertise includes malware removal and computer forensics. I'm active in the various online anti-malware communities where I do researches for new malware threats as they are released.

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