I am using a old motherboard which doesnt have a native SATA driver on the chipset (I think). When I installed WinXP on this computer I had to either use the press F2 (or was it F7) or something when installation, and have the driver on a floppy driver. Thats why I have a old 20 GB PATA disk for system disk, which is slow and makes a loud noise. I hoped that Win7 installation already had the drivers, and could be installed easily but that is not the case. I think the drivers is from Silicon, and it is not support for Win7. The motherboard is a Asus K8V deluxe, and the sata disk is a Samsung Spintpoint with 250 GB.