Simple-Tech.info

Update driver from ATA mode to SATA/AHCI on a Windows XP computer
Adapt procedure with your driver, in this example is a driver for a "Dell Precision M6500"

Chose update driver on the FIRST “primary IDE channel” in the device manager.

Select No not this time

Chose advanced option

Don’t search, I will…

Have Disk..

Navigate to C:\drivers\storage\R245068

Chose the driver selected bottom (6port)

Click YES 

Click finish

Click YES

Change value in BIOS by pressing F12

Reboot
Logon on
Reboot
DONE !