Do I need to ScanDisk or Defrag a CD or DVD?
No. A CD, DVD, CD-R, and Blu-ray cannot be modified by Microsoft ScanDisk, Microsoft Defrag, or any other disk checking utility. These utilities are only used to fix issues that may exist with computer hard drives and floppy diskettes.
If you're having problems reading a disc, we suggest you try cleaning the disc. Often smudges, fingerprints, hair, or other substances on the disc can cause read errors. Additional help with cleaning discs can be found in our disc cleaning tips and tricks.