I just put a P4 2.4 together for a friends son today. His HDD was small so i got him a WD SATA 40GB drive. I have installed all cables and when booting from the Windows XP CD after it goes through the checking your system phase it prompts you to " press enter to install XP". Once i press enter i get no HDD found press F3 to exit. As the bios is scrolling by i see my WD SATA listed on Secondary ( it was Primary i changed it to see if secondary would work). I am at a loss guys, I have no idea what i missed. Andy There is a Legacy power supply option on the HDD along with the SATA power connection, i have tried both ways and neither changes the outcome. I looked in the bios 20 times for a setting and found nada. Why does XP not See my SATA HDD ?