title: SQL Network Interfaces, error: 26 - Error Locating Server
body: <p>I hope someone can help me with this. I have differente projects (websites) in Visual Studio 2010. Today when I try to expand one of the databases in the data connections of the server explorer, I get a window with this error:</p>
  
  <blockquote>
    <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: 26 - Error Locating Server/Instance
    Specified)  Description: An unhandled exception occurred during the
    execution of the current web request. Please review the stack trace
    for more information about the error and where it originated in the
    code.</p>
    
    <p>Exception Details: System.Data.SqlClient.SqlException: 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: 26 - Error Locating Server/Instance
    Specified)</p>
    
    <p>Source Error: </p>
    
    <p>An unhandled exception was generated during the execution of the
    current web request. Information regarding the origin and location of
    the exception can be identified using the exception stack trace below.</p>
  </blockquote>
  
  <p>The situation occurs in ALL my projects. I suppose this happens because I installed Kaspersky 2012 yesterday. Please I need help.</p>