The default view in the Windows 7 start menu power button is Shtdown. But should you wish you can change it.

You may change its default action to:
- Swtich User
- Log off
- Lock
- Restart
- Sleep
- Hibernate

To do so, right click on Taskbar > Properties > Start Menu tab  > Power button action > Drop down menu > select action > Apply > OK.

If you have liked this post, you might want to check out some more, on topics like Power, Tips.