Ever since Matt got the Asus formula V motherboard, and updated the BIOS on it, he gets a "Disk IO" error whenever he accesses his hard drives in Windows 7. The chatroom says he could roll back to a prior version of the BIOS. Leo suspects that when he updated the BIOS, it may have wiped the configuration memory on the motherboard. When he starts up his system, he should enter BIOS and look for "enhanced system configuration data" or "ESCD". It also could show up as an option to "Reset configuration data". Choosing that option and resetting the ESCD and restoring the defaults could solve his issue.