When you set a password for your BIOS and forget it, what should you do!.

OK, there is some methods to clean BIOS password, I'll show you follow me & read carefully.
The computer motherboard there is a piece called (BIOS /  CMOS ) contain information stored where the default settings for the BIOS manufacturer,and you as a user of the device or an engineer or technician want to edit some of the available settings on the BIOS (such as a password when log into the BIOS, change the date and time, boot priority  from hard disk or CD, eliminate the use of certain ports such as USB port - LAN - printer port... etc) these adjustments saved in the "CMOS" and retains them even if electricity cable has been removed, but these settings disappear in 3 cases:

1 - Removing CMOS battery from Motherboard for a period of 15 to 30 minutes.

2 - The end of battery life, it has the number (CR2032) you'll find it in hardware stores or in watchmaker.

3 - Using "Jumper" to clear CMOS modifications in specific position.


IMPORTANT NOTES:
When we want to disconnect the CMOS battery and remove it from motherboard or we want to deal with  motherboard  in general you should do the following:

1 -  Unplug the power cable from the computer ( from the back of the device permanently).

2 -  Unplug the screen cable which is connected with the computer (because it delivers some shipments through the screen cable to motherboard ).

3 -  Separate any cable may be plugged into the device by electricity (such as printer - scanner ... etc).

4 - before you open the compute touch any external metal object  ((non-computer)) to discharge static charge from your body because it may cause damage to some pieces of the device.

5 - It's strongly recommended that you wear a rubber gloves to make sure you don't transfer any shipment to device parts.

Method n°=1 ( removing the CMOS battery )

removing CMOS battery

1 -Open the computer case, then look at the motherboard you 'll find the CMOS battery with the number  ( CR2032 ).

2 - Now remove the battery & leave it outside the motherboard  for 15 - 30 minutes (and the device is disconnected from all power cables).

3 -put the battery back into the motherboard and turn-on the computer, you 'll have no BIOS password!.

Method n°=2 ( using jumper )

a jumper is a short length of conductor used to close a break in, or bypass part of, an electrical circuit.

1 -find the jumper on the motherboard, it's labeled as CLEAR, , JCMOS1, CLR, CLRPWD, PASSWD,CLEAR CMOS, PASSWORD,PWD,PSWD .

jumper

2 -remove it from the two pins its currently on so that it covers the pin that isn't covered. exp: in the picture pins 1 & 2 are covered, you need to remove the jumper and put it on pins 2 & 3.

3 - when you do that turn-on the computer, you'll find that the BIOS password was cleaned.

4 - now turn-off the computer and switch the jumper to the original position.

Method n°=3 ( using software )

like "PC CMOS Cleaner", but the boot priority must be from the CD in advance!, remember you don't have the password so you can't edit BIOS settings.

1 - Download the software "PC CMOS Cleaner 2.0" (official) for free.

PC CMOS Cleaner 2.0

2 - it's an ISO image, you need to burn it in CD or DVD, you can use "free ISO burner"

3 - put the CD/DVD in the drive and reboot your computer, then press any key to boot from the CD/DVD drive.

4 - the software 'll be opened, step1: try possible password for your BIOS ( you need to write them in a paper ), if it does't  work click on Next for step2.

5- step 2: rest the BIOS to default status
choose "choice 1" first ( to keep date and time), if it does't work try "choice 2" , the BIOS password 'll be erased.

that was the 3 popular ways to remove BIOS password, if you need any help or question i'm here,just leave a comment!