http://en.kioskea.net/forum/affich-34116-downgradi ng-vista-to-xp-hp-pavilion-dv4-113You may need to integrate the correct SATA drivers to your Windows XP installation CD using N-lite software. HP Pavilion dv4/dv5 laptop uses the same SATA drivers. These laptops does not have the option to disable the SATA configuration in the BIOS.