I have a Pentinum 4 3.2 ghz installed on a ASUS P4C800. I am also using Windows XP home version. Everytime my computer is restarted or turned on i get this error message A new CPU has been installed! Press F1 now to confiugre settings or F2 to load default settings. F1 Enter Setup F2 Load default settings and continue My ROM battery is fine and it holds the time settings perfectly, I have no idea why it keeps picking up a new cpu everytime.