Click on OK button and you will have an error. Why?
(At this kind of question in a day I answer in other day you answer, today is a day when you'll answer)

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Gheorghe Ciubuc,SQL Server Influencer, MCP(SQL 2000), MCTS (SQL Server 2005) , OCA(Oracle 9i), Sybase(Brainbench)

Hints:

• One of the selected options cannot be used with Windows 2000 and Windows XP operating systems.
• Another of the remaining two options will generate an error on Windows 2003 and above as well as on Windows 2000 and Windows XP due to the arguments supplied.

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Cristian Andrei Lefter, SQL Server MVP
MCT, MCSA, MCDBA, MCAD, MCSD .NET,
MCTS, MCITP - Database Administrator SQL Server 2005
http://sqlserver.ro

The answer is:

"SQL Server 2005 can use Windows password policy mechanisms only on Windows Server 2003 and above(look for must_change option in Books Online)" 

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Gheorghe Ciubuc,SQL Server Influencer, MCP(SQL 2000), MCTS (SQL Server 2005) , OCA(Oracle 9i), Sybase(Brainbench)

On Windows 2000 and Windows XP you cannot use the MUST_CHANGE option.

 The password complexity checking for Windows 2000 is very simple, you are not allowed to use the following password: null or empty, the computer name, the login name, 'password', 'admin', 'administrator', 'sa', or 'sysadmin'.

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Cristian Andrei Lefter, SQL Server MVP
MCT, MCSA, MCDBA, MCAD, MCSD .NET,
MCTS, MCITP - Database Administrator SQL Server 2005
http://sqlserver.ro