Eye candy is all the stuff that makes XP look prettier than its predecesors.
Its that nursery school luna theme when you first install it, the 32bit alpha blended icons, shadows underneath the icon text and all that visual stuff.
If you want to go back to the "classic " windows look, then right click the desktop - properties - themes -select windows classic.
If you want the old style start menu then right click the taskbar - properties - start menu - select classic start menu.
If you want to further tweak visual settings then right click My Computer - properties - Advanced - Performance - Settings - Visual Effects, and untick anything you might not need/want switched on.
Hope this helps.