if the sony laptop already has an OS on it or a newer version of windows than XP, you have to uninstall the current OS on the sony vaio. also, that means reformatting the Hard Drive on the sony which actually wipes it clean. Before you do that, you should have the original disk of the sony pc drivers installation or you need to go to the product(sony vaio) web site so you can download those drivers for (PCG-61213W) to disk or flash drive. after wiping Hard drive, you can install the XP, then the drivers that you downloaded. However, viaos are strange pc's so i would ask Sony if this XP install will be compatible with the Sony pc hardware components first. good luck.