When i turn the computer on it prompts for a bios password.

Resetting the CMOS password on an Acer Aspire laptop is much more difficult than resetting the password on a desktop.
Disassembly steps vary from model to model, but on most models, you'll have to take apart the computer to access the CMOS battery.
Don't take apart the notebook if you don't have experience disassembling PCs.
After turning off the computer and disconnecting the AC adapter, take out the battery (different from the CMOS battery).
All visible screws must then be removed from the bottom of the notebook.
Remove all components stored to their separate compartments on the base of the notebook.
Turn over and open the PC. Lift up the switch cover and remove the screws securing the keyboard to the PC, if any are visible.
Remove the keyboard.
Remove the screws securing the monitor to the hinges, and then set the monitor aside.
Disconnect all visible cables connected to the motherboard; and then remove the screws from the top cover.
Remove the top cover to reveal the motherboard. Locate and then remove the CMOS battery. Leave it out of the notebook for 24 hours; then reinstall it and reassemble the Acer Aspire.
Other Options
If removing the CMOS battery fails to clear the password, or if you dont feel comfortable with the idea of opening your computer, you might be able to gain access to the computer using a backdoor password.
These special passwords were implemented to allow technicians to access locked computers. Not all models recognize backdoor passwords.
Most Acer Aspires use the Phoenix BIOS, and backdoor passwords for this BIOS include BIOS, CMOS, phoenix and PHOENIX.
All of these passwords are case-sensitive.

Is it an aspire ?
Resetting the CMOS password on an Acer Aspire laptop is much more difficult than resetting the password on a desktop.
Disassembly steps vary from model to model, but on most models, you'll have to take apart the computer to access the CMOS battery.
Don't take apart the notebook if you don't have experience disassembling PCs.
After turning off the computer and disconnecting the AC adapter, take out the battery (different from the CMOS battery).
All visible screws must then be removed from the bottom of the notebook.
Remove all components stored to their separate compartments on the base of the notebook.
Turn over and open the PC. Lift up the switch cover and remove the screws securing the keyboard to the PC, if any are visible.
Remove the keyboard.
Remove the screws securing the monitor to the hinges, and then set the monitor aside.
Disconnect all visible cables connected to the motherboard; and then remove the screws from the top cover.
Remove the top cover to reveal the motherboard. Locate and then remove the CMOS battery. Leave it out of the notebook for 24 hours; then reinstall it and reassemble the Acer Aspire.
Other Options
If removing the CMOS battery fails to clear the password, or if you dont feel comfortable with the idea of opening your computer, you might be able to gain access to the computer using a backdoor password.
These special passwords were implemented to allow technicians to access locked computers. Not all models recognize backdoor passwords.
Most Acer Aspires use the Phoenix BIOS, and backdoor passwords for this BIOS include BIOS, CMOS, phoenix and PHOENIX.
All of these passwords are case-sensitive.

Step 1:
The Acer Aspire stores the password in a component called the complementary metal-oxide semiconductor. This component is integrated into a random access memory chip embedded on the motherboard. The CMOS holds data that the basic input/output system - a critical software utility that controls how the computer operates at startup - accesses when the computer boots. If the BIOS detects that a password is registered in the CMOS, it will prevent the computer from booting until the user enters the password correctly. Depending on which model of Acer Aspire you own, you may be able to clear the CMOS manually. Contact Acer before attempting to clear the CMOS, as opening the computer without permission could void your warranty. Desktop Models Some Acer Aspire desktop models come with a jumper that is used to clear the password and other settings stored on the CMOS. This jumper is located on the motherboard and is often found next to a label such as "JBIOS1" or "CLR_CMOS." To clear the CMOS using the jumpers, turn off the computer, disconnect the power cable and remove the case cover. Remove the jumper shunt from pin 1 and pin 2; then place the shunt on pin 2 and pin 3. Return the shunt to its initial position after 10 to 15 seconds. If the Aspire doesn't come with a jumper to reset the CMOS, the CMOS can be reset by removing the lithium coin-cell battery instead. Removal is accomplished by pushing down on the tab securing the battery to the motherboard and lifting the battery out of its slot. Leave the battery out for 24 hours, and then return it to its original position with the positive sign facing up. Laptop Models b> Resetting the CMOS password on an Acer Aspire laptop is much more difficult than resetting the password on a desktop. Disassembly steps vary from model to model, but on most models, you'll have to take apart the computer to access the CMOS battery. Don't take apart the notebook if you don't have experience disassembling PCs. After turning off the computer and disconnecting the AC adapter, take out the battery (different from the CMOS battery). All visible screws must then be removed from the bottom of the notebook. Remove all components stored to their separate compartments on the base of the notebook. Turn over and open the PC. Lift up the switch cover and remove the screws securing the keyboard to the PC, if any are visible. Remove the keyboard. Remove the screws securing the monitor to the hinges, and then set the monitor aside. Disconnect all visible cables connected to the motherboard; and then remove the screws from the top cover. Remove the top cover to reveal the motherboard. Locate and then remove the CMOS battery. Leave it out of the notebook for 24 hours; then reinstall it and reassemble the Acer Aspire. Other Options b> If removing the CMOS battery fails to clear the password, or if you don't feel comfortable with the idea of opening your computer, you might be able to gain access to the computer using a backdoor password. These special passwords were implemented to allow technicians to access locked computers. Not all models recognize backdoor passwords. Most Acer Aspires use the Phoenix BIOS, and backdoor passwords for this BIOS include "BIOS," "CMOS," "phoenix" and "PHOENIX." All of these passwords are case-sensitive.

• The CMOS is, in basic terms, the part of the motherboard that stores the BIOS settings. To remove the BIOS password from your Toshiba laptop, your best option is to forcibly clear the CMOS.
  To clear the CMOS, you must remove the battery from your laptop and leave it out for at least 30 minutes to an hour. The way to remove the battery from your Toshiba will largely depend on the model. A common way to remove the battery--particularly with newer models--is to release the battery lock on the bottom of the laptop, while sliding the accompanying tab over to the side. This will pop the battery out from its tray so that you can then pull it out all of the way out.
  Before you remove the battery, turn off the laptop and remove the AC adapter. Otherwise, you could end up harming yourself or the laptop components. You must also ground yourself to prevent damaging the laptop with static electricity.
  After about a half an hour or more, return the battery back to its tray and lock it into place. Power on the laptop. The computer, ideally, should no longer ask you for a BIOS password.
  It's important to keep in mind that resetting the CMOS means that all of your BIOS settings will be reset to factory default. Also, sometimes you may need to leave out the battery for much longer than an hour to reset the password.
  

• If resetting the CMOS doesn't work, then your next bet is to try using a backdoor password. A backdoor password is basically a password that manufacturers include with the BIOS so that technicians can access the computers that people send in for repair. An example of a Toshiba backdoor password is, unsurprisingly, "Toshiba." When the BIOS prompts you to enter a password, entering "Toshiba" may allow you to access your PC and clear the old BIOS password. Another option is to hold the left "Shift" key down while booting.

https://www.youtube.com/watch?v=LmFsGb4fVQk

If you've forgotten your BIOS password, or if someone has changed the password on your Toshiba laptop without your permission, then there are a couple things that you can do to reset the password and access your computer.

Reset the CMOS

· The CMOS is, in basic terms, the part of the motherboard that stores the BIOS settings. To remove the BIOS password from your Toshiba laptop, your best option is to forcibly clear the CMOS.

To clear the CMOS, you must remove the battery from your laptop and leave it out for at least 30 minutes to an hour. The way to remove the battery from your Toshiba will largely depend on the model. A common way to remove the battery--particularly with newer models--is to release the battery lock on the bottom of the laptop, while sliding the accompanying tab over to the side. This will pop the battery out from its tray so that you can then pull it out all of the way out.

Before you remove the battery, turn off the laptop and remove the AC adapter. Otherwise, you could end up harming yourself or the laptop components. You must also ground yourself to prevent damaging the laptop with static electricity.

After about a half an hour or more, return the battery back to its tray and lock it into place. Power on the laptop. The computer, ideally, should no longer ask you for a BIOS password.

It's important to keep in mind that resetting the CMOS means that all of your BIOS settings will be reset to factory default. Also, sometimes you may need to leave out the battery for much longer than an hour to reset the password

Use a Backdoor Password

· If resetting the CMOS doesn't work, then your next bet is to try using a backdoor password. A backdoor password is basically a password that manufacturers include with the BIOS so that technicians can access the computers that people send in for repair. An example of a Toshiba backdoor password is, unsurprisingly, "Toshiba." When the BIOS prompts you to enter a password, entering "Toshiba" may allow you to access your PC and clear the old BIOS password. Another option is to hold the left "Shift" key down while booting.

helo

go to the link below to get further assistance
but basically to reset the password, follow these steps.

If the Power-on password (POP) is forgotten and the Supervisor password is known, simply go into the ThinkPad BIOS setup utility and reset the Power-on password, otherwise try the following:

1. Turn off the computer.
2. Remove the battery pack.
3. Remove the backup battery (CMOS battery --size of coin- located on mainboard, requires you to remove the plastic cover on rear on computer)
4. Turn on the computer and wait until the POST ends. After the POST ends, the password prompt does not appear. The POP has been removed.
5. Reinstall the backup battery and the battery pack.
   Note: Some ThinkPad systems have the ability to reset the Power-on passwords in the ThinkPad BIOS setup utility if a Supervisor password has been set.

http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-59377

if this helps, please rate my service -- if not let me know - i will continue to help

There's no way that we can determine the BIOS password of your laptop. But if you can disassemble your laptop and locate the CMOS battery you can remove the CMOS battery to reset the BIOS together with the password. After resetting the CMOS battery you will no longer be asked to enter a password for the BIOS when you turn on your computer. However, there are instances that even though you reset the CMOS it's still asking for the password, for this concern, the computer manufacturer should deal with this concern.

Generally, there are two ways to reset forgotten HP BIOS password. One is forcing BIOS/CMOS to reset itself to its stored defaults by removing all power to it. The other is to use a program to either locate or identify the password and reveal it to you or erasing the password entirely.
And the most easiest and convenient method for erasing dynamic BIOS/CMOS settings is to remove battery directly from the motherboard. It applies to most motherboards besides HP Elitebook BIOS. At this moment, HP Elitebook based on UEFI Bios provides a tool to reset BIOS password specially - HP SpareKey.

How to reset BIOS password with SpareKey?
1. Before forgot BIOS password, you have set answers to three predetermined personal identification questions.
Write down the answers to these questions and put them in a safe place, away from the computer, so that you can always access them.

2. When you cannot remember the password to access the BIOS on your computer, turn on the computer and immediately press the ESC key to display the Startup Menu. And then press the F7 key.

3. HP SpareKey wizard pops up and prompts you for the answers to the three personal identification questions. If you successfully answer the questions, you are granted access and you can reset the password.
If you do not answer the questions correctly in the three attempts, you will be locked out of your computer. And then you must contact HP for assistance.

Note: HP SpareKey cannot help you recover a Windows 7 or Vista administrator account password. It is intended solely to recover system-level passwords.
http://www.isunshare.com/windows-7-password/reset-hp-elitebook-password.html

There is a battery on the motherboard. Removing it for about 1/2 hour should clear the bios. There are several software methods also. Google 'bios password removal' to find one.