1.First goto start->run->type “diskpart” and enter(with out quotations)
2.Type “list volume” (with out quotations)
3.select the volume of drive u want to hide by this command “select volume3” (with out quotations)
4.Then type “remove letter f” (with out quotations)
(It removes the drive f)
5.If u want re-assign the drive
a. First goto start->run->type “diskpart” and enter(with out quotations)
b. Type “list volume” (with out quotations)
c. select the volume of drive u (before) hide by this command “select
volume3” (with out quotations)
d.THEN type “assign letter f” (with out quotations)


EXAMPLE:
DISKPART> list volume

Volume ### Ltr Label Fs Type Size Status Info
---------- --- ----------- ----- ---------- ------- --------- --------
Volume 0 D DVD-ROM 0 B
Volume 1 C NTFS Partition 20 GB Healthy System
Volume 2 E New Volume NTFS Partition 49 GB Healthy
Volume 3 F New Volume NTFS Partition 78 GB Healthy
Volume 4 G New Volume NTFS Partition 86 GB Healthy
Volume 5 H SUBBU FAT32 Removeable 978 MB

DISKPART> select volume 3
Volume 3 is the selected volume.
DISKPART> remove letter f
DiskPart successfully removed the drive letter or mount point.
DISKPART> select volume 3
Volume 3 is the selected volume.
DISKPART> assign letter f
DiskPart successfully assigned the drive letter or mount point.