Change Drive Letters

(1). Go to Start > Control Panel > Administrative Tools > Computer Management > Disk Management.

(2). Then at the right-side you will see the partition of your hard disk.
(3). Then choose a partition for you want to change Drive letters and right click on it.

(4). whose name you want to change (clicks in the white area just below the word "Volume") and select "change drive letter and paths."

From here you can add, remove or change drive letters and paths to the partition