My notebook is protected by password. I type a password, that I think it's match, but the notebook still cannot access, & BIOS says, Password check failed. & now, I want to reset BIOS. How do I reset this BIOS??

Power On Password & Hard Disk Password
With your next laptop you should protect it with a Power On Password AND put a password on your hard disk. This will stop anyone from using your laptop and if they move the hard disk from your laptop to another laptop they cannot access the data on your hard disk with the hard disk password.
BUT you need to write down or remember these passwords; if you lose or forget them you cannot gain access to your laptop.
There are no backdoor passwords to remove these passwords.
To set up or change these passwords, go to the BIOS configuration - then security configuration. http://techtips.salon.com/reset-hp-laptop-bios-password-1476.html

Dell Laptop with bios or hard drive password set ? Unlock your dell laptop using the link below if it display a message that says "this computer system is protected by a password authentication system, you cannot access the data on this computer without the primary or administrator password, when you turn on the computer. This message is what you get if the BIOS is protected by a password. or you get system disabled

Go to: http://dell-inspiron-b120-bios-password.biospwd.com to get your dell bios password authentication and get full access to your dell computer, they can unlock almost all dell laptop such as dell inspiron, xps, latitude, precision, studio, vostro

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hope it helps

Dell Laptop with bios or hard drive password set ? Unlock your dell laptop using the link below if it display a message that says "this computer system is protected by a password authentication system, you cannot access the data on this computer without the primary or administrator password, when you turn on the computer. This message is what you get if the BIOS is protected by a password. or you get system disabled

Go to: http://dell-inspiron-6400-bios-password.biospwd.com to get your dell bios password authentication and get full access to your dell computer, they can unlock almost all dell laptop such as dell inspiron, xps, latitude, precision, studio, vostro

go to biosremoval.com they can help, works for me every time.
my laptop had bios password hard drive password and windows password. which was unlocked using bios removal services from biosremoval.com

Dell Laptop with bios or hard drive password set ? Unlock your dell laptop using the link below if it display a message that says "this computer system is protected by a password authentication system, you cannot access the data on this computer without the primary or administrator password, when you turn on the computer. This message is what you get if the BIOS is protected by a password. or you get system disabled

Go to: http://dell-inspiron-9400-bios-password.biospwd.com to get your dell bios password authentication and get full access to your dell computer, they can unlock almost all dell laptop such as dell inspiron, xps, latitude, precision, studio, vostro

Dell Laptop with bios or hard drive password set ? Unlock your dell laptop using the link below if it display a message that says "this computer system is protected by a password authentication system, you cannot access the data on this computer without the primary or administrator password, when you turn on the computer. This message is what you get if the BIOS is protected by a password. or you get system disabled

Go to: http://dell-inspiron-1318-bios-password.biospwd.com to get your dell bios password authentication and get full access to your dell computer, they can unlock almost all dell laptop such as dell inspiron, xps, latitude, precision, studio, vostro

This laptop is protected with a Power on Password.
The password is setup from the BIOS configuration.
There is no backdoor password available and you need the password to boot up the laptop. Once you can boot up the laptop you can enter the BIOS configuration to remove the Power on password.
Removing the BIOS battery to restore the factory defaults will not remove the password because the password is stored on an EEPROM chip.

Password for what?

Operating System?
BIOS?

For BIOS try this Software:
http://www.4shared.com/file/82179383/4262ad3d/DELL_Bios_Pass_Killer_2008_By_Virility.html

What make/model of computer?  What operating system? What BIOS type/version/revision?

 

There IS a way to reset it without losing the data on the drive. It sounds like he has set up a password in the system BIOS or either password protected an entire volume in Win 200x/Vista.

 

If he has set a BIOS pw, you can remove the batteries and jumper the CMOS reset pin for a few seconds...IF you can get to it.  If you can determine the BIOS name/version, I can probably put you onto a boot diskette that will clear the BIOS.

 

For 3 bucks, I'll send the boyfriend a virus!!!   lol