Hi, After a fresh installation of Windows 7 Ultimate x64, I am unable to boot on my hard disk. The screen "A disk read error occured, press Ctrl + Alt + Del to restart" displays on every boot. I think this is not related to Windows but to the hard disk itself. I changed the bios option before install windows in order to activate the AHCI Mode... Maybe it needs a driver so I will now try to install AHCI driver. Hope it will work... Any idea about what it could be ? PS: I am french so apologize for my poor english.