You would usually access Program Files through C:\Windows . Click on "My Computer" in the Start Menu, then click on your main HDD, most likely C:\, then go to "Program Files."
Yeah, the same applies. Or if you mean the "All Program" link in the start menu, then it has something to do with your computer's registry.
If you have it set up in classic view then you can right click on start then on explore you will see program files.This will explain how to change it to classic view. http://windows.microsoft.com/en-US/windows-vista/Change-Windows-to-Classic-view