title: cannot connect to sql server from management studio
body: <p>Hi I am not experienced in sql server admin. I have in program files microsoft sql server
  and the properties say it is 225 mb and contains 499 files ....version not mentioned : I do not know if it 05/08 /12 .....and I did not install it ; perhaps gotten installed with visual studio 2013 trial copy ; or with visual studio 13 for web which I have installed recently.
  anyway now I have installed sql server management studio express and wanted to connect to sql server.
  I tried   as instance name  mycomputer name which is kobosh  and the default instance name   : kobosh/mssqlserver but I cannot connect</p>
  
  <h2>TITLE: Connect to Server</h2>
  
  <p>Cannot connect to kobosh\MSSQLSERVER.</p>
  
  <hr>
  
  <p>ADDITIONAL INFORMATION:</p>
  
  <p>A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 25 - Connection string is not valid) (Microsoft SQL Server, Error: 87)</p>
  
  <p>For help, click: <a href="http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&amp;EvtSrc=MSSQLServer&amp;EvtID=87&amp;LinkId=20476" rel="nofollow">http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&amp;EvtSrc=MSSQLServer&amp;EvtID=87&amp;LinkId=20476</a></p>
  
  <hr>
  
  <p>BUTTONS:</p>
  
  <h2>OK</h2>