VPN for Windows provides error codes and messages for installation pre-requisites, installation, connection, activation, and authentication issues. This article describes the error messages including error code, description, and recommended resolution for the error encountered.
Installation Pre-Requisites errors table
| Message/description | Resolution |
| The Malwarebytes installer cannot be run from a network drive. | Install VPN for Windows from the device's local hard drive. |
| Your system does not have enough free disk space to install Malwarebytes. | Free up storage space on your device to install Malwarebytes for Windows. |
| You do not have sufficient permissions (either disk or registry) to install Malwarebytes. | Install VPN from a user profile with Admin permissions. Contact your system administrator. |
| To complete the installation of Malwarebytes, your system may need to be restarted. Click Yes to continue anyway and you will be prompted when a restart is needed. Click No to cancel the installation. | Click Yes to continue the installation and restart after it completes. Click No to cancel the installation. Restart your device, then run the installer again. |
| Update Windows to stay protected. A missing Windows security update is required to update Malwarebytes. | Check system requirements, and review Windows 2019-09 Security Update for Windows devices running Malwarebytes home products, then try installing again. |
| Invalid path. | Submit a ticket with Support. |
| The installation failed to start. Please try running the installer again. For help troubleshooting please review the information at https://www.malwarebytes.com/help-installing |
Follow installation troubleshooting information, then try installing again. Installation troubleshooting for Malwarebytes on Windows devices |
| The installation failed. Please restart your system and try running the installer again. For help troubleshooting please review the information at https://www.malwarebytes.com/help-installing | Follow installation troubleshooting information, then try installing again. Installation troubleshooting for Malwarebytes on Windows devices |
| Restart required. Malwarebytes must restart your computer to finish the installation. Some functionality may be limited until your computer restarts. | Restart your computer to complete the installation process. |
Installation errors table
| Message/description | Resolution |
| This version of Windows is not Supported. | The up-to-date version of Malwarebytes cannot be installed on this device. Install VPN for Windows on another device. |
| An error has occurred and Malwarebytes will not install on your computer. | Submit a ticket with Support. |
Connection errors table
| Code | Message/description | Resolution |
|
MB404104 |
Network error. Unable to contact update server. Please check your Internet connection. | Check you have an active internet connection. If the issue persists, submit a ticket with Support. |
| MB404104 MB405105 MB406100 |
Network error. Unable to contact license server. Check your network connection or contact your system administrator for help. | Check you have an active internet connection. If the issue persists, submit a ticket with Support. |
| Network error. Bad proxy configuration error. | Submit a ticket with Support. | |
| SSL validation error. There was a problem validating SSL certificates. | Submit a ticket with Support. | |
| Connection issue. It looks like you’re already using a VPN. Turn it off and try again. | Disconnect the other VPN product, then try again. If the issue persists, submit a ticket with Support. | |
|
|
Connection issue. Could not connect. Please check your Internet connection and then try again. | Check you have an active internet connection. If the issue persists, submit a ticket with Support. |
| Connection issue. Could not connect. Please check your Internet connection and then try again. | Check you have an active internet connection. If the issue persists, submit a ticket with Support. |
Activation errors table
| Code | Message/description | Resolution |
| MB403100 | License key inactive. There's an issue with your license key. Please contact Support. | Submit a ticket with Support. |
| MB403101 | License issue. There's an issue with your license key. Please contact Support. | Submit a ticket with Support. |
| MB403102 | Expired license key. Your license key has expired. | Purchase a valid subscription. Visit our Pricing page. |
| MB403103 | License key issue. This license key does not match the product you are trying to activate. | Purchase a valid subscription. Visit our Pricing page. |
| MB403104 | License issue. This license key was already used to activate the maximum seats available. | Deactivate devices or purchase another subscription. See how to deactivate a device or visit our Pricing page. |
| MB403104 | No available devices. Your subscription is already in use on the maximum 5 devices. Free up a device by deactivating Malwarebytes on one of your devices or purchase another subscription. | Deactivate devices or purchase another subscription. See how to deactivate a device or visit our Pricing page. |
| MB403105 | License key inactive. This license key has been refunded. | Purchase a valid subscription. Visit our Pricing page. |
| MB404101 | License issue. Installation_token not found. | Submit a ticket with Support. |
| MB404102 | License key issue. This license key does not match our records. Please make sure you entered it correctly. | Check your license details and try again. If the issue persists, submit a ticket with Support. |
| MB404102 | License key issue. Invalid key format. Please make sure you entered your license key correctly. | Check your license details. If the issue persists, contact Support. |
| MB404102 | License issue. Entitlement not found for this product. | Purchase a valid subscription. Visit our Pricing page. |
| MB404103 | Error. Unknown error. Please contact Support. | Submit a ticket with Support. |
| MB404105 | No subscription found. You have a Malwarebytes account, but you still need to purchase a VPN subscription. | Purchase a valid subscription. Visit our Pricing page. |
Authentication errors table
| Code | Message/description | Resolution |
| MB405100 | You have reached the maximum amount of sign in attempts. To unlock your account, contact support. | Wait a minimum of 24 hours, then try to sign in again. If the issue persists, submit a ticket with Support. |
| MB405108 | Verify your email and password are correct and try again. | Check your sign in credentials, then try to sign in again. If the issue persists, submit a ticket with Support. |