Hide ur drives || Lock ur drives

Open Registry (go to run command, type "regedit" and press enter)

then go to this key

HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Policies\Explorer

now right click in right side pane and create DWORD Value (blue color)

Rename it as "NoViewOnDrive" (for locking drive)
or
Rename it as "NoDrives" (for Hiding drive)

double click on it and put some numbers to lock ur desired Drive and click ok.

DRIVE NOS.
FOR A : 1
FOR C : 4
FOR D : 8
FOR E : 16
FOR F : 32
FOR G : 64
FOR H : 128

finally restart or log-off the computer to take effect.


Keep in mind that "0" is Default Value to Disable or remove this setting..


After locking the drive when u try to open it, u will see a msgbox like this
"This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator"

another way to do this....

above method is good and their is another method to this.

Just follow the steps:
1. Go to Start > run > type "diskpart".(Without Quote)
a dos window will appear with following prompt.


DISKPART>

2. Then type "list volume" this will look like it


Volume### Ltr Label Fs Type Size Status Info
-------------- ---- ------ --- ----- ---- ------- --
Volume 0 F DC-ROM
Volume 1 C NTFS Partition 7000MB Healthy
Volume 2 D soft NTFS Partition 8000MB Healthy
Volume 3 E ---- NTFS Partition 8000MB Healthy


3. If u wanna hide drive E then type "select volume 3"then a message will appear in same winwods { Volume 3 is the selected volume}


4. Now type " remove letter E" now a message will come { Diskpart Removed the Drive letter }sometime it requires the reboot the computer .


5. Diskpart will remove the letter .Windows XP is not having capabilty to identify the unkown volume.


Don't be afraid about the data, it will remain in the drive. To Come back to the Drive repeat the process . but in 4th step which is shown in this post replace " remove" to "assign"i mean type " assign letter E"