Okay.... When my computer has been completely shutdown for at least 15 minutes, upon boot up I will receive the disk boot error. My temp fix is to use the power switch at the back of the tower then quicly switch it back on and boot up again with no problems. Once I do this, I can reboot until my I'm blue in the face and I never see this error again until I shut down for 15 minutes. 1. I have reformated and re-installed the os (win XP pro SP3) 2. Ensured the bios boot sequence is correct 3. Chnaged my CMOS battery 4. Changed my IDE cable 5. Ran fixboot, fixmbr and chkdsk /r from the XP cd repair utility 6. Ran Norton 360 on both my HDD's Anyone see something I don't?