- Compatible with:
- Windows
- Available in:
- Desktop Security version 5
Error Message
Unable to contact update server. Check your proxy settings or contact your system administrator for help.
Error Code
MB404104
What caused the error message
You tried to install the app on your device while using a VPN or a proxy server. An error occurred and the installer could not connect to the server to verify your app, so you received the error code and message above.
How to resolve the error
Check your internet connection and restart the router if needed. You should also review our installation troubleshooting guide to rule out other issues. After checking your internet and troubleshooting other possibilities, try running the installer again. If you still receive the error message, submit a ticket with Support.