I tried installing 2000 pro on a new Hd. It crashed half way through. WHen I restarted I got the NTLDR IS MISSING. I did not have a boot disk so I put the Hd in my friends computer and we deleted all the partions so I could reinstall an OS. Now that I have put it back in I cant get any of the Os disks I have to start up. It Now says DISK BOOT FAILURE. Replace system disk and press any key. What do I do now? Should I formatt my drive or what?