Missing operating system

Missing operating systemIf you are receiving the Missing operating system or Operating System not found error message, it is recommended that you follow the steps below to resolve the issue.

Caution: Make sure the bootable disc or diskette is designed for your operating system. For example, do not use a Windows 98 bootable diskette and follow the steps below on a computer with Windows XP.

  1. Make sure there is no CD or Floppy diskette in the computer. We also recommend disconnecting all USB drives, including any MP3 players. If a CD or diskette is in the computer, remove it and restart the computer to see if the issue is resolved.
  2. If the problem still exists, using a write protected bootable diskette, boot from the diskette and at the prompt, type sys c: and press Enter. You should then see the message system transferred. Once this has been completed, reboot the computer. If you get any other messages, see the Boot disk page.
  3. If the preceding step does not resolve your issue, boot from the diskette again and at the prompt type "fdisk /mbr" and press enter. This should just return you back to the prompt. Once back at the prompt, reboot the computer.
  4. Finally, if steps two and three do not resolve the issue, it is recommended that you boot from the boot diskette again and repair or format and reinstall the operating system.

Additional information

  • See our operating system definition for further information and related links on this term.