How can I fix SQL Server Error 40 quickly and safely?

If you’ve been stuck with Error 40, here’s what worked for me:
Simple Steps:
1 Check that SQL Server and SQL Browser services are running.
2 Verify TCP/IP is enabled in the SQL Configuration Manager.
3 Try reconnecting with the correct credentials.
4 If the database is still inaccessible, use the DRS SQL Database Recovery Tool.

This tool scans and repairs corrupted SQL databases that often cause connection failures. Within minutes, my database was back online without data loss.

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