Convert a basic disk to a dynamic disk:

BEFORE PROCEEDING )
HELP
1) Log on as Administrator or as a member of the Administrators group.
2) Click Start, and then click Control Panel.
3) Click Performance and Maintenance, click Administrative Tools, and then double-click Computer Management.
4) In the left pane, click Disk Management.
5) In the lower-right pane, right-click the basic disk that you want to convert, and then click Convert to Dynamic Disk.
NOTE:You must right-click the gray area that contains the disk title on the left side of the Details pane.
6) Select the check box that is next to the disk that you want to convert (if it is not already selected), and then clickOK.
7) Click Details if you want to view the list of volumes in the disk.
8) Click Convert.
9) Click Yes when you are prompted to convert, and then click OK.