How to remove bios password

How to reset The Latitude C640 Bios password?!

1.First flip your laptop over and remove the battery, as well as any cables connected to the laptop.
2.Remove the screw latched into the memory panel on the bottom of the computer found near the rear.
3.Lift the panel off and expose the memory modules.
4.Seek for a small push-button and press it, holding it for about two seconds. Reassemble your laptop and start it up.

Thank You!

If you know how to dissemble your computer and are comfortable with it, open it and remove the CMOS battery, wait about 10 minutes, put it back and turn on your machine. All BIOS settings should have been restores to factory defaults, including passwords. Hope this is helpful.

If it is a BIOS or a HDD password, then there is no universal default password and you will need to contact Dell details here:
http://www.fixya.com/support/r3656360-dell_portable_computer_bios_hard_drive
Since it is a Latitude C Series, it has lifetime free phone support from Dell
If it is a windows password
http://www.fixya.com/support/r3743393-ve_lost_or_forgotten_windows_password

This could be a heat problem if the processor heatsink has become unseated or filled up with dust/hair/ etc.
remove the 6 screws labeled "k" from the bottom, remove the keyboard and inspect/clean it.

hi,
check if any updates are availble for the bios
go to support.dell.com > drivers and downloads > put in your service tag and check if any update is available you can update your bios

you can also try restore your bios to factory settings you have an option for this in the bios menu as well and then connect the drive and then boot.

Further Queries are welcome
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To remove a BIOS password will require the assistance of Dell Tech Support. 800-624-9896 You will have to be able to prove you are an authorized user and if out of warranty a Fee may be involved.

It looks like Dell is pretty tight with this info. They want you to contact their tech support in one of these ways:

http://support.dell.com/support/topics/global.aspx/support/dellcare/contact_technical_support?c=us&l=en&s=gen

Before doing that though, I'd remove all power, unplug the CMOS battery and let it sit for a while before hooking the battery back up, applying power and see what happens.

clear the cmos, or remove the battery for a few minutes, that will clear any bios password

regards

remove the battery and remove the bios. reinsert the bios and battery if that dont work there is jumbers on the board you have to remove check your motherboardsmanual online.

Hi, The only way for that is to contact dell support. you're gonna need help from a level 2 tech from austin as they're the only one who has the master password for that.