Hi Fernando, It is the second time that i have problems with drivers sata for win. xp. My Pc dont identify the hd. I did all that you writed on top. During the OS installation using a nlight cd, drivers ICH7 64 bits inside, the system show a error with this messange: iaStor.sys corrupted. I lost six cds trying and it isnt work. I tried put all drivers 64 bits and the problems is same... My motherboard is: GB g31mes2c HD: sansung hd502hi System: windows xp professional 64bits Please, help me. Ronan