Are you still on the Windows XP Operating System and didnt upgrade to the Vista? If not you can still make your windows get the same looks of Vista using a Skin pack , also called as the Transformation packs. These are packages which contain lot of files and tweaks which includes changes to the Desktop, Start Menu Icons, Added Animations, Pictures & Menu’s.
The advantage of using this package is that its completely free unlike other available transformation packs which need you to pay some money, and also this installation can be rolled back if you dont want to continue with these new graphics. You wont need the Windows XP original CD in case you want to revert back to the old style. This Pack is supported by Windows XP SP1, SP2, SP3 and Windows 2003.