I recently installed XP Home Edition SP3 (build 2600) on a repurposed machine. Every morning when I boot up the machine, I get an "Operating System not found" message. Ctrl+Alt+Delete is enough to bring it up properly afterwards, and I have no problems throughout the day if I need a restart for updates, etc - but I am puzzled why this occurs. Boot sequence is set properly, everything works fine other than this one glitch. Any ideas welcome....?