Ok, sig rig pretty up to date, I have 2 ide hd's 250gb and 350gb, but run system off of a 300gb sata drive, I just replaced my 80gb sata drive, because windows showed a ftdisk error "The system failed to flush data to the transaction log. Corruption may occur" After replacing the hd with the 300gb w/ fresh copy of xp pro, all was cool for about 10days, now same thing. It will reboot sometimes after the computer has been on for a while. For instance when I switch levels on a css dm server, or in the middle of a movie. Then after about 6 weeks will not load windows or see hd on boot, I will switch cables and sata ports, reboot and I get my 10 days of freedom from errors??? any ideas?