Applies to: Sophos Home  for Windows

You receive the following message when installing Sophos Home “Installation Unsuccessful. Failed to register with the Sophos server.” 


  • An extended characters (such as å, ä, ö, ü, ë, etc.) is present in the computer name.
  • You have reached the maximum number of registered computers under your Sophos Home account. 


Solution 1 – Extended characters
If you are using extended characters: Rename the computer so that it does not contain any extended characters.
Visit Microsoft’s website for additional assistance renaming your devices: Rename your Windows 10 PC

Solution 2 – Remove a computer from your Dashboard

If you have reached the computer limit (Sophos Home Free up to 3 computers, Sophos Home Premium up to 10) :
Follow the steps to remove a computer from your Dashboard

Please visit our FAQ regarding maximum number of computers you can register within a Sophos Home account: How many computers can I add to my Sophos Home account? 

Source : Official Sophos Brand
Editor by : BEST Antivirus KBS Team

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