


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.Follow the steps below to fix the problem. The steps are based on:
C:/Windows/System32/services.mscand start the SQL Server instance, e.g., XQLEXPRESS03 (typo of SQLEXPRESS03), created when SQL Server setup:

C:/Windows/System32/mmc.exeand configure the SQL Server Network by setting the TCP Port to 1433:

C:/Windows/System32/services.mscand start the SQL Server instance, e.g., XQLEXPRESS03 (typo of SQLEXPRESS03), created when SQL Server setup:

C:/Windows/System32/mmc.exeand configure the SQL Server Network by setting the TCP Port to 1433:



db_accessadmindb_backupoperatordb_datareaderdb_datawriterdb_ddladmindb_denydatareaderdb_denydatawriterdb_ownerdb_securityadminpublicSecurity ⇒ Logins ⇒ New Login...


master database in SQL Server is a critical system database that stores essential system-level information.
It contains metadata about the SQL Server instance, such as logins, server configuration settings, linked servers, and the location of all other databases.
Without the master database, SQL Server cannot start or function.

