Here's a nifty spreadsheet for IT Pros.  It's the list of all of the Windows Vista Group policy settings.  Actually, there are more settings in the spread than for just Windows Vista.  Download it.  Study it.  There will be a test on Friday. 

Here's the first question:

1. How many GPO settings for Windows Vista force a reboot?

The quiz key is at http://www.microsoft.com/downloads/details.aspx?FamilyID=41dc179b-3328-4350-ade1-c0d9289f09ef&DisplayLang=en