How can I unlock the sa account on SQL SERVER 2005?

I have administrator privilege.  When I try to login into SQLSever 2005 Management Studio, it say the account is lock.  Could you give me the steps to unlock the sa account?

Do I use the SQL Server Surface Area tool?  How do I unlock the account using this tool?
cookiejarAsked:
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MaheshConnect With a Mentor ArchitectCommented:
Try below.
For unlocking SA, you just have to connect as a machine administrator to the server. The machine administrators are by default granted access to SQL Server. Once you connect as an administrator, you can issue:
 ALTER LOGIN sa WITH PASSWORD = 'new_password' UNLOCK
 OR
via the registry:
Default instance:
"HKEY_LOCAL_MACHINE\Software\Microsoft\MSSqlserver\MSSqlServer\LoginMode"
to 2 for mixed-mode or 1 for integrated.
After restarting the service you should be able to logon with a local administrator and reactivate the sa account again.
Thanks
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