Error 3004 when installing Sophos AntiVirus

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If you receive error 3004 when installing/reinstalling Sophos, it’s due to permissions on the registry.

Please be careful when making changes to the registry and always take a backup.

Try the below fix:

Check that administrators and system have full control to the below registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE

HKEY_LOCAL_MACHINE\SOFTWARE\Sophos
(If this key is not present, create it and apply the above permissions)

HKEY_LOCAL_MACHINE\Software\Classes

HKEY_LOCAL_MACHINE\Software\Classes\Interface

HKEY_LOCAL_MACHINE\Software\Classes\Typelib

Try installing Sophos again

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