I'm working on an Acer Aspire 5050 with a Phoenix bios. It needed a new hard drive so I put one in but neither XP nor Vista recognizes the Sata drive I put in. I formatted it via a desktop computer but still no luck. I've been reading online and a suggestion was to switch Sata mode in bios to AHCI but that isn't an option in this bios. I've been searching high and low for a sata driver to use when installing windows but without luck. I'm wondering if there isn't a driver because the bios is natively in AHCI and the sata controller is toast. I'm hoping someone has some answers!