Upon startup, the boot screen indicates no Primary or Secondary Master hard drives detected. I use auto detect in the BIOS. (My primary is a WD 100 GB and Secondary a Maxtor 60 GB. I then cycle power and on the second or third try, it boots as normal. It does this maybe every third startup. The system runs W2k and its an Asus A7M266 motherboard with 1.33GHz Athlon uP and 512 MB of DDR. I have not dicked with any of BIOS settings or voltages and do not overclock.