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The "no network adapter found" message seems more like a Windows setup/configuration issue. If you really meant some other error instead, perhaps like
The network adapter could not establish the connectionthen the following may shed some light:
Re: SQL developer download - unable to connect
So in fact you do need a database to access, either local or remote. The act of installing a database locally will create "predefined" usernames with passwords you can override.
Hope this helps,
SQL Developer Team