Accidentally Shutting Down

To save power, I often "Sleep" my home computer.

Or with a zero client, I often "Lock" my computer.

To prevent myself from accidentally clicking "Shut Down" in the Start Menu and to configure your power button:

1) Right click on your taskbar

2) Properties | Start Menu tab

3) Change the "Power Button Action".

Note that the button on the bottom right of your start menu is considered a power button...