Thanks HanShi.

I didn't install "Sql Server Management Studio Express" because user no need use.

could you tell me, where can I run this query?

Please explain me, little more detail.

I check this code in query window, It is working well but user have no knowledge how to use query window and setting password.

USE [master]

GO

ALTER LOGIN [sa] WITH PASSWORD=N'new_password'

GO

Thanks Again,

thenndral