Hi, every OS change the sectors of the hard disk to work with it so its diff to recover .
your lap worked that mean that the bios is reset to defult. go to BIOS and search for boot piorety make the...

i a not an expert in vaio but i think the problem is (BIOS need to reset)

what you can do so you can skep this step
is to reformat your hard disk to NTFs files
so you can setup xp