I have a NF7-S with two 40gb IDE drives and one 120gb SATA drive. Windows XP refuses to boot off either drive now. After posting it displays, "Disk error, replace system disk and press enter." But the computer will boot fine with the Windows XP system disk in the CD-ROM drive. I can see and work with all three drives in Windows XP, so it is not a driver problem or SATA controller problem I don't think. I do not know what is causing this. Any information or suggestions would be appreciated. Thanks!