(1)打开Manage Studio。

(2)click on the  .\sqlexpress, select property, click security, make sure use mix...

连接MSSQL2008 Express

(3)click security,find sa account, enabled it

连接MSSQL2008 Express

(4)reset sa password

连接MSSQL2008 Express

 

(5)make sure you can login with sa

连接MSSQL2008 Express

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