Press the start key, type “compmgmt. msc” in the search field and press Enter. Select Disk Management from the options on the left of the Computer Management window. Access Disk Management directly by pressing the Start key, typing “Disk Management” and pressing enter. The Disk Management window should pop up.
Right-click the partition you want to delete and click “Delete Volume” from the menu. Look for what you called the drive when you originally partitioned it. This will delete all data from this partition, which is the only way to unpartition a drive. For Windows 7 and Vista users: Right click the same partition and select “Delete Partition” from the menu. You should now see the partition as unallocated space. The partition should be highlighted on the top with a black bar, as opposed to a purple bar for the other partitions.
Keep on clicking Next to progress through the Wizard. Click Finish when available.
Click on the name of the disk, rather than any drives beneath the disk, such as Main.
After clicking, you should see a header titled “Partition Information” beneath the tabs.
After clicking, be sure there is a blue border around the white box.
Again, be sure you have backed up any data you want to preserve. This step will delete any data on the partition.
This step may take a little while depending on how much data is on the main drive. The disk is being reformatted, so give it time.
