Disk Defragmenter limitations in Windows

This article describes the Disk Defragmenter limitations.

Original KB number:   227463


The Disk Defragmenter tool is based on the full retail version of Diskeeper by Diskeeper Corporation. The version that is included with Windows provides limited functionality in maintaining disk performance by defragmenting volumes that use the FAT, the FAT32, or the NTFS file system.

More information

This version has the following limitations:

  • It can defragment only local volumes.
  • It can defragment only one volume at a time.
  • It cannot defragment one volume while scanning another.
  • It cannot be scheduled.
  • It can run only one Microsoft Management Console (MMC) snap-in at a time.

The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.