cicchis0

I'm not sure if this is too basic, but you need to be using a SATA HDD and cable. Check the manual for your HDD to make sure it supports SATA (shouldn't be a problem if you connected it using a SATA cable) and there are no jumpers that you need to alter.

Yes, and it's quite straightforward: you just need to edit one registry setting before switching back to AHCI in BIOS. Run regedit (type 'regedit' into the start menu search bar) Find HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci Modify the Start key and change its value to 0. Exit the Registry Editor, restart your PC and make the BIOS change. Vista should automatically install new drivers and will prompt to restart. I found this information at http://www.itwriting.com/blog/?p=288