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1. Open Computer Management by clicking the Start button

, clicking Control Panel, clicking System and Maintenance, clicking Administrative Tools, and then double-clicking Computer Management.*

If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
2. In the Navigation pane, under Storage, click Disk Management.
3. Right-click the volume, such as a partition or
logical drive, that you want to delete, and then click Delete Volume.
4. Click Yes to delete the volume.
The resulting empty space is called unallocated space if you deleted a primary partition, or free space if you deleted a logical drive within an extended partition. You can now use the empty space to create additional volumes.
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How to Use the Fdisk Tool and the Format Tool to Partition or Repartition a Hard Disk