Okay, I read previous posts but it is like reading heiroglyphics. I am a novice. My Dell Dimension did not recoginze my hard drive. I bought a new larger hard drive, watched video on how to install (take out old one, put in new one). I have my original Dell discs but when I try to boot up it says keyboard is not there. We swapped keyboards and turned off, turned on, but still it will not reboot from disc. Now it says it does not have keyboard again. How do I get this thing to reboot from disc?