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Microsoft Drive Optimizer (formerly Disk Defragmenter) is a utility in Microsoft Windows designed to increase data access by rearranging files stored on a disk to occupy contiguous storage locations, a technique known as defragmentation. The application was first officially shipped with Windows 95 as Disk Defragmenter.

From Windows 8 onwards, the program was renamed to Microsoft Drive Optimizer, with some references changed to say Defragment and Optimize Drives or simply Optimize Drives.

Early history

Debut and early versions

Windows XP and Server 2003

Windows Vista and Server 2008

Windows 7 and later

References

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