same here.. Thanks to Jack, DJ Ramses and Higado
The only difference is I am in dual boot config (XP SP2 main and Win 7). I was able to switch both to ACHI.. i.e. using exactly Higado's detailed method. I also have 3 partitions 1) XP 2) Win7 3) Data
It went like this:
Note: I have mobo drivers dvd with the AHCI driver in it. In the "Have Disk" portion, I selected the drivers from the dvd drive
XP
-Login to XP, update according to Higado..
-Restart
Win7
-Reset the BIOS to IDE before login to Win7 (still in IDE mode at this time), otherwise win7 detects startup error and attempts to repair. In my case, I did this hoping WIn7 could switch to ACHI drivers automatically. It did not, so I swiched to IDE mode.
-Update the driver (same procedure)
Restart and finally, switch to ACHI mode
My mobo is Asus, anyway