wrong setup disks for the machine
Presumably its a SATA drive? WinXP setup disks (except very late ones with service pack 3 integrated) don't contain the drivers to enable the SATA connection during setup. They have to be loaded via a floppy during the early stages of setup by using the F6 routine.. And it needs to be a "real" floppy drive - USB ones don't work
I'll guess that Sony machine does not have a floppy drive - in which case you're scuppered. You need to get the correct disks for the model, and they'll probably be a recovery image CD, NOT a windows setup CD
You need to speak to whoever mis-sold you the windows setup disk, and get it swapped for the correct one