One of the differences between Windows Vista and Windows XP is the name of some of the icons in the Control Panel. In Windows XP, there was an icon called, "Add or Remove Programs". While that icon still exists in Vista, the name has been changed to "Programs and Features".
So now when you want to uninstall a program in Windows Vista, you'll have to click on the "Programs and Features" icon in the control panel first. The window that comes up looks basically the same as the old one in XP. And the process for uninstalling a program is pretty much the same.
Scroll down the list until you find the program you want to uninstall and then highlight it (single click). Then click the UNINSTALL button near the top of the window and follow the rest of the prompts (if any).
That's all there is to it.