Have just built new systemhenom9950, m/b GA MA78GM-S2H,2g ram@800, Nvidia 9800gtx.Had vista premium 64 already installed.On boot, after verifying data got message "missing NTLDR". Tried fresh install. After formatting hdd & repartitioning, Vista said "unable to find suitable volume on which to install." Tried installing xp home premium(32bit).It loaded to reboot stage then came up with"read error"(no error no. given). Have three sata 80g hdds and tried them all with same result. Any ideas welcome!!!!!