Disk I/O error as computer starts

Updated: 04/01/2018 by Computer Hope

A disk I/O error occurs any time the computer is unable to read a diskette, disc, or other disk in the computer. Below are different recommendations to try before assuming the diskette, disc, or other disk is bad.

Floppy diskette, CD, or DVD in the computer

Computer CD-ROM

If you are attempting to boot the computer from a floppy diskette, CD, or other disc follow the below recommendations. Make sure no floppy diskette or CD is in the computer since the computer may be trying to boot from a non-bootable disk, which may cause this error.

  1. Remove the floppy diskette or CD from the computer and put it back in and press any key to continue.
  2. Try rebooting the computer.
  3. Recreate the bootable diskette or CD you are attempting to boot since the disc may be bad. If this is a CD or DVD (not burned), try cleaning the disc or make sure there are no smudges or fingerprints on the bottom of the disc.
  4. Try booting the diskette or disc in a different computer. If that computer can boot without the error, it is likely you have a problem with your drive.

No diskette or CD in the computer

If you have no diskette or CD in the computer, and are getting the Disk I/O error as the computer is starting this is referring to your hard drive. Unfortunately, this is often an indication of a hard drive failure, follow the hard disk fail recommendations for additional steps in troubleshooting this issue.

Additional information