How can you reset the BIOS password and unlock a computer?

Answer 1

If it's a desktop PC, erasing the cmos memory will usually clear it. Turn the power off, remove the cover. There should be a battery, these days they use a large silver disc watch battery type. Near it should be three pins with a linker on two of them. Move it to the other side, so the middle pin is linked to the other pin. Leave it there for a few seconds and then put it back in it's original position. Replace the covers and boot up. You will then have to reset your BIOS options etc.. On Laptops, they all most always write the password to EEROM or flash memory, which don't need a battery. Unfortunately, sometimes the only way to clear these, is to remove the chip and use a programmer to load it with the latest BIOS from the manufacturer or replace it with a new one. Dell computers have a master password which is unique to each computer. That password can be obtained from Dell customer service.

Answer 2

This information is intended for experienced users. It is not intended for basic users, hackers, or computer thieves.

Please do not try any of following procedures if you are not familiar with computer hardware. I take no responsibility for the use or misuse of this information, including personal injury, loss of data or hardware damage.

Use this information at your own risk.

A. By Using the Motherboard Jumper:In most motherboards, the CMOS battery is soldered. This makes it difficult to remove the battery. In this case we use another method.

Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand.

You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most manufacturers label the jumper as CLR, CLEAR, CLEAR CMOS, etc.

When you find the jumper, look carefully. There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. e.g. if the jumper joins the center pin to the left pin, then remove it and join the center pin to right pin.

Now wait for a few seconds and then again remove the jumper and join the center pin to left pin.

Make sure to turn the PC off before opening the cabinet and resetting the jumper.

B. By Using Software:I have found that BIOS/CMOS Password Recovery Tool is the most effective:

BIOS/CMOS Password Recovery Tool is a program that works instantly to remove any lost or forgotten BIOS/CMOS passwords. Simply boot your PC to DOS and execute the program, and get access to forgotten BIOS/CMOS passwords in just seconds. BIOS/CMOS Password Recovery Tool Service - See related links.

Answer 3

There are many software available for this purpose. Also there are default passwords available on some web sites. Using a manufacturers backdoor password to access the BIOS Use password cracking software Reset the CMOS using the jumpers or solder beads. Removing the CMOS battery for at least 10 minutes Overloading the keyboard buffer Using a professional service