I successfully installed Windows 7 64bit in AHCI mode on a PC with 3 new 3TB Western Digital WD30EZRX Caviar Green hard drives. Then I installed "Intel Matrix Storage Manager Driver [v126.96.36.1993]" & as soon as Windows restarted after installing it, Windows would not boot, & will now only boot in IDE mode. In IDE mode I have to do a system restore to the point before installation of "Intel Matrix Storage Manager Driver" to be able to boot again in AHCI mode. I have not had this problem before with 2TB/1TB hard drives. Does anyone have any idea what's going on here?