Your notebook PC was not designed to operate with the Windows Vista operating system.
HP does not support the upgrade from XP to Vista for non-HP Certified Vista capable PCs. HP provides neither Vista drivers nor technical support for non-HP Certified Vista Capable PCs.
Attempting to install Windows Vista on a PC not listed as HP Certified Vista Capable may cause a loss of your programs and personal data, and the PC and peripherals may operate with limited functionality or not at all.
If you encounter operational problems after attempting to install Windows Vista using an unapproved process, and / or install software that is not approved and not provided by HP, HP recommends that you do a clean installation of Windows XP to restore the PC to its original condition.