Windows 7 shutdown with countdown

You have seen the way how Mac OS X shutdown would prompt user with countdown message before its will shutdown automatically, this will prevent user from accidentally end the session.

Is there a way to change the Windows 7 "Shut down" default behaviour to include countdown timer in case I forget to save my works on time?

Look at this, and change to default to hibernate. Not really what you want, but it will do the same thing (stop you from shutting it down accidentally).

There is no countdown feature, but you can avoid the accidental shutdown like this:

You can change the default by Right-clicking the taskbar and going to Properties>Start Menu>Power button action and changing it to "Hibernate".