The SQL Server service cannot start when you change a protocol parameter for a clustered instance of SQL Server 2000 or of SQL Server 2005 to a value that is not valid

In a clustered environment, when you change a protocol parameter for a clustered instance of Microsoft SQL Server 2000 or of Microsoft SQL Server 2005 to a value that is not valid, the SQL Server service cannot start. Additionally, you cannot change the protocol parameter back to the original value.

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