Claiming back your Free Space caused by VSS

If you have lost free space after defragging, then this was almost certainly caused by Shadow Copies.

To delete volume shadow copies manually and safely:

  1. Start the Disk Cleanup program (normally located in the Accessories folder).
  2. Select the drive where the shadow volume copies are located (typically, the drive where Windows Vista is installed), and click OK.
  3. On the More options tab, in the System Restore and Shadow Copies section, click Clean Up.
  4. Disk Cleanup prompts you to confirm the action. Click Delete.

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