Intellitype software v2.01, get it from www.microsoft.com/download
You have to set the function from the keyboard settings in control panel. Also you have to set the power function under display properties too.
I've found the settings dont appear in display properties/power until you have used some of the buttons.. so I press the sleep button.. let PC shutdown, then wake it up.. go into control panel/power and voila I can set the buttons for power down state.
OK got my shutdown button to work now!!. Thx stuy_b.
I d/loaded software, installed, then went into Control Panel Power Options. Clicked Hibernate >Enabled hibernation, Clicked Advanced - a Power buttons options became available. Change "When I press the sleep button..." to whatever you prefer - do nothing/ask what to do/hibernate/shutdown, click OK. Done!