How to reset lost admin password in Fortigate?

NOTE :-This process will require the reboot of the FortiGate.
Requirements:
·Console cable
·Terminal software like Putty.exe
·Serial no. of the FortiGate device
Steps:
1. Connect console to the fortigae
2. Start putty.exe with default settings
3. Putty Settings:
·Speed Baud 9600
·Data Bits 8Bit
·Parity None
·Stop Bits 1
·Flow Control No Hardware Flow Control
·Com Port The correct com-port
4. The firewall will then respond with its name/ hostname.
5. Reboot the firewall
6. Wait until the Firewall name and login prompt to appears. The terminal window will display as follows:
FortiGate-100d (18:52-06.18.2014)

Ver:040000100

Serial number: FGT60C3G1007716011

CPU(00): 565MHz

Total RAM: 1024 MB

NANDinit… 138 MB

MAC Init… nplippte#0

Press any key to display configuration menu…
……

reading boot image 11637092 bytes.

Initializiing firewall…

System is started.

login:

7. Type username: maintainer
8. The password is bcpb+ serial no. of the firewall
Eg.:bcpbFGT60C3G10016011
9. Now you will be connected to firewall. Changing the admin
passwd …
In case of vdoms are not enabled:
config system admin

edit admin

set password

end

In case ofvdoms are enabled:
config global
config system admin
edit admin
set password end

Disable/Enable the maintainer feature
To disable
config system global
set admin-maintainer disable
end

To enable
config system global
set admin-maintainer enable
end