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How to fix "Umbraco cannot start. A connection string is configured but the Umbraco cannot connect to the database." error on local dev website

Recently I have started working on a Umbraco v7 website and as a first step, I wanted to create a local database by restoring it from a backup file, and after creating the DB and create a new Login for the Umbraco v7 database, I started to see the following problem;



After doing some investigation, I realised that other people had a similar problem with their Umbraco V7 local websites. After trying some of the suggestions, I ended up doing some more investigation and came up with the following solution;

  • Right-click on your localhost and select Properties
  • Go to the Security page and select "Server authentication" as "SQL Server and Windows Authentication mode"
  • Hit OK.
  • Go to Services and find your SQL Server service and restart it.
  • You should be able to see your website now. If you still have problems, check your local setup and permissions. 
  • Further details are below, hope this helps somebody else.










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