I am using WINDOWS 10 PRO 64 OS and Installed SQL server 2012 with both Windows authentication and SQL server authentication both mixed.When I am trying to login into the SQL server with SQL server Authentication with default Username as :sa and Password as :123,it is throwing error unable to connect to the server ,Error:233.I have tried every thing by enabling tcp/ip and Named pipes.Also changed the windows fire wall setting for port.Below is the screen shot of the error.Please find me the solution.enter image description here
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Are you 100% sure you have the correct password? Try it with a blank password. – SQLChao Apr 27 '16 at 14:48
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try (localhost)/INSTANCE_NAME. For example, I'm assuming your machine name is MADHUBABU-PC, so try MADHUBABU-PC\SQLEXPRESS. (I'm not sure what you named your sql instance.)
Here is a nice link to find your instance name: How to find server name of SQL Server Management Studio
