Ok, I used microscope diagnostic tools to wipe the HD of a Dell Optiplex GX400. All is fine like it usually is when I wipe hard drives, but now when it boots I can't get it to load the windows XP disk I have (I know the disk works, I've used it several times, even made a new copy of the file I know works). I get two options initially, press f2 for setup (which does nothing to help me) and f12 for network boot which just takes me to the screen it goes to next automatically. At this screen I have two options, f1 to retry boot and f2 for setup, no matter what I do it doesn't seem to work. Any suggestions would be much appreciated! Thanks!