Good evening, It could well be a SATA problem. Simple but not top level optimization: We'll have to change the SATA mode from AHCI to IDE, or Compatible Legacy (well, the opposite of AHCI or Native). The modification is done in the BIOS. The PC should display a message like "Press F2 to enter setup". He must navigate the menus looking for the option (if any) and modify it.In this way, windows xp should not bigger when loading the driver for hard disk controller. More optimized method: If the option does not exist in the bios, it will take you a different PC, the software Lite, SATA driver controller, a CD burner and a blank CD. The idea is you "make" a Windows XP CD including the driver and SATA controller to install XP without this concern. Hopefully your problem is well that one!