Is blocking my disk hard and not me is password, cannot do anything after three attempts my laptop dell latitude E6400, shuts down

How to Recover Dell Latitude e6400 Bios or HDD password Feb 12 2014 USA Try this link for more details. Electro help

The Dell Latitude E6400 laptop comes with an Intel Core 2 Duo processor for fast computing and an NVIDIA graphics card for video playback, gaming and Web browsing. The laptop has a built in Wi-Fi card, letting you connect to the Internet on-the-go. However, if you're unfamiliar with Dell or the laptop's factory installed Windows Vista operating system, you might not know how to enable to Wi-Fi.

Slide the switch on the side of the laptop toward the front of the laptop. This switch enables Wi-Fi connectivity on the Dell Latitude E6400. When switched into the back position, the Wi-Fi is turned off. Turn on your Dell Latitude E6400 laptop and log into Windows Vista. Click on the Windows "Start" button. Click on "Wireless," located in the Start menu's "Show" list. A list of currently broadcasting wireless networks appears on screen. With your Wi-Fi enabled, you can connect to any of these available networks. Secured networks ask you for a password when you click "Connect," while unsecured networks connect automatically.

are you sure its a bios password?

At one time , I had the experience with forgetting windows password. Finally I use Windows Password Recovery Tool 3.0 .The program is easy to use.

It's worth a try!

Resource: http://www.windowspasswordsrecovery.com

u can easilyn remove the bios password by removing cmos battry for abt 3 to 5 mins and in a laptop the laptop battry itself cointains cmos battry so u just need to take out battry and then switch ont the laptop without battry then insert the battry and switch it on again good luck

This is a bit hard to change if someone has manually changed it, the default password from dell is usually

Dell
(case sensative)

other from that.. I can't really help you sorry.

Hello
you dont need to buy new hard drive until you confirmed that your hard drive has no more, for the purpose you need check in CMOS setup, if it is detected by computer then there is a chance to re-use the hard disk, you just need to re-install windows, during installation format the hard disk after re-partition.
if this method fails then you need to buy new one, good luck
do rate the solution if got help

try reading this article
http://www.computerhope.com/issues/ch000235.htm

Do you mean the BIS Password or the Administrator Password?