I have finished making my first computer and am having trouble installing the OS. I have Windows XP Home Edition and when I place it in my computer everything so far is ok. Then It says that no other version of microsoft was found on my computer(duh new pc) and that I need to insert the Win NT 3.15, NT 4.0, 2000 Professional, 95, 98, or Millennium to continue. So, is there no way around this other than buying an old OS disk just to install this other OS on my pc?