Hello everyone 
  I know this has been up quite alot.. but i really haven?t found any solution yet .. 
 I?ve been googling for a solution for the last 2? hours without luck .. 
All i've been able to get from my googling is that i have to enable something called " ACHI " in my bios .. 
 but i've been looking trough my bios like 20 times.. and i cant find it!! 
 Please people 

 .. Any help would be great .. 
My system:
GigaByte - EP31-DS3L
Intel - Core2Duo E6550 
Kingston - 4GB PC6400 DDR2 
Nvidia - 8800GTS 512mb
Seagate - 200GB 7200RPM ( SATA ) 
guess that all i can tell .. 
 PLEASE .. any help would be great!! 
Sorry for my bad english btw 

In advice, thanks!