I was given a Dell Optiplex GX 240 and had to replace the battery on the mother board. Went into the Bios and reset the time/ date etc. I am not trying to install Win XP Pro. At boot up I get a warning the Primary and secondary drives were not found. Went back into the Bios where it says that the floppy, cd rom and hard drives are not installed. What am I doing wrong? Thanking you in advance, Hennessy.