I was terrified when I first saw SQL Server Error 40: Could not open a connection to SQL Server. The error typically happens when the SQL Server instance cannot be reached, which could be the result of a faulty database file, improper configuration, or network problems. Before using the DRS SQL Database Recovery Tool, I spent hours adjusting connection strings and firewall settings without success. It not only assisted me in resolving the problem, but it also easily recovered all of my important MDF and NDF data.
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