When you install a PC with Windows Vista there are a number of windows services that get installed by deafult. Here is a Vista Services list, however a full list of Vista Services complete with explanations can be found here on this page: Vista Services...
Windows Vista has more drivers built-in at launch than any previous version Windows - 19,500 in fact! Another 11,500 will be waiting via Windows Update too... In contrast, Windows XP only had 10,000 drivers on its CD, with only 2000 on the Windows Update...