Hard drive partions

it can be done on command prompt or use soft like paragon hdd utility

Right click "My computer"--mange--storage--disk management, and then select the partition which you want to delete. Note extend partition should be deleted twice.

Or you could use Partition Assistant to manage your partition, personally I'd like to use this software, it works without any hiccups and everything works fine!
. THERE is a tutorial about how to delete partition: http://www.disk-partition.com/help/delete-partition.htm...