Did you change it using the options located at properties > appearance > Windows Classic ? If so, its just a matter of selecting Windows XP Style.
Or, if the Windows XP style isn't listed there, go to > Control Panel > Administrator Tools > Services > and confirm that the service "Themes" is enabled.
![[Image: img2cv1.jpg]](http://img264.imageshack.us/img264/2640/img2cv1.jpg)