How to Change the Color Scheme in Vista
This will show you how to change the Color Scheme in Vista to either one of the Windows Aero (All Vista editions except Home Basic), Windows Vista Standard (Only the Vista Home Basic edition), Windows Vista Basic, Windows Standard, Windows Classic, High Contrast White, High Contrast Black, High Contrast #2, and High Contrast #1 options for your edition of Vista.These services with these default settings are responsible for the desktop theme. If these are disable, you would have nothing but the Windows Classic color scheme. To change these, see: How to Disable or Enable Vista Services With a Advice Guide
Desktop Window Manager Session Manager (Default setting: Started and Automatic)
Themes...