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Malwarebytes 4.2.0 - Can't activate my Licence Key

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Hello everyone.


I bought a licence for my Malwarebytes today. I tried activating it, but it wouldn't work.
I am constantly presented with an "Error 404101" message and the indication that my Internet is to blame.

As you can see, by me writing this right now, my Internet is working fine.
I have allowed Malwarebytes through my Firewall and even used the Proxy option.
Sadly no difference. My Malwarebytes refuses to connect to the internet.

I am the admin of my Computer, so that cannot be the problem, either.


It would be nice if someone had an idea what to do, since I am at my wits end.

  • I tried to activate it over the Program
  • I changed the Proxy
  • I changed the language and Proxy
  • I activated the licence over my Malwarebytes account on the website and tried to connect that to the program
  • I tried at least 20 different tips I have seen online about this issue

No result.
I am from Germany and use the program for personal use.


Please, someone, help! I don't want this to become an utter waste of 40€.


Sincerest Thanks

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  • Staff

***This is an automated reply***


Thanks for posting in the Malwarebytes for Windows Help forum.

If you are having technical issues with our Windows product, please do the following:

Malwarebytes Support Tool - Advanced Options

This feature is designed for the following reasons:

  • For use when you are on the forums and need to provide logs for assistance
  • For use when you don't need or want to create a ticket with Malwarebytes
  • For use when you want to perform local troubleshooting on your own

How to use the Advanced Options:

  1. Download Malwarebytes Support Tool
  2. Double-click mb-support-X.X.X.XXXX.exe to run the program
    • You may be prompted by User Account Control (UAC) to allow changes to be made to your computer. Click Yes to consent.
  3. Place a checkmark next to Accept License Agreement and click Next
  4. Navigate to the Advanced tab
  5. The Advanced menu page contains four categories:
    • Gather Logs: Collects troubleshooting information from the computer. As part of this process, Farbar Recovery Scan Tool (FRST) is run to perform a complete diagnosis. The information is saved to a file on the Desktop named mbst-grab-results.zip and can be added as an email attachment or uploaded to a forum post to assist with troubleshooting the issue at hand.
    • Clean: Performs an automated uninstallation of all Malwarebytes products installed to the computer and prompts to install the latest version of Malwarebytes for Windows afterwards. The Premium license key is backed up and reinstated. All user configurations and other data are removed. This process requires a reboot.
    •  Repair System: Includes various system-related repairs in case a Windows service is not functioning correctly that Malwarebytes for Windows is dependent on. It is not recommended to use any Repair System options unless instructed by a Malwarebytes Support agent.
    • Anonymously help the community by providing usage and threat statistics: Unchecking this option will prevent Malwarebytes Support Tool from sending anonymous telemetry data on usage of the program.
  6. To provide logs for review click the Gather Logs button
  7. Upon completion, click OK
  8. A file named mbst-grab-results.zip will be saved to your Desktop
  9. Please attach the file in your next reply.
  10. To uninstall all Malwarebytes Products, click the Clean button.
  11. Click the Yes button to proceed. 
  12. Save all your work and click OK when you are ready to reboot.
  13. After the reboot, you will have the option to re-install the latest version of Malwarebytes for Windows.
  14. Select Yes to install Malwarebytes.
  15. Malwarebytes for Windows will open once the installation completes successfully.













If you are having licensing issues, please do the following: 


For any of these issues:

  • Renewals
  • Refunds (including double billing)
  • Cancellations
  • Update Billing Info
  • Multiple Transactions
  • Consumer Purchases
  • Transaction Receipt

Please contact our support team at https://support.malwarebytes.com/hc/en-us/requests/new to get help

If you need help looking up your license details, please head here: Find my premium license key



Thanks in advance for your patience.

-The Malwarebytes Forum Team

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  • Solution
10 minutes ago, LBS said:

Haven't been able to check the PC in quite some time X_X

Malwarebytes is blocked in the Windows Firewall.


FirewallRules: [{134BCC4D-A463-47D0-AD09-39FB69AB1C58}] => (Block) C:\Program Files\Malwarebytes\Anti-Malware\MBAMService.exe (Malwarebytes Inc -> Malwarebytes)

Please restore the default settings. https://www.tenforums.com/tutorials/70749-restore-default-windows-defender-firewall-settings-windows-10-a.html

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