How to reset BIOS?

You will have to reset the BIOS if,

• You are not able to login to your computer as you forget your BIOS password (not windows login password).  

• If there’s any virus in BIOS. 

• Some times when you insert a new RAM

The virus on the BIOS will start functioning after installing on the hard disk. In some cases the hard disk will be working most of the time even though you are not using any program on your computer (and if the antivirus idle scan is not working) or you can see the red light for the hard disk is glowing most of the time. Some people reformat the hard drive and install the operating system from scratch or change the hard disk but soon they will know that the issue is not resolved.

To fix this issue we need to reset the BIOS. The steps involve removing and reconnecting the CMOS battery back after 10 minutes.

               

To reset the BIOS and BIOS password:

1. Turn off your computer or unplug the power supply to the computer.
2. Open your computer case.
3. Remove the CMOS battery which looks like below.

 
     4.  Wait for 10 to 15 minutes.
     5.  Place the CMOS battery back to the same place from where you removed it.
     6.  Now the BIOS is resetted.

Note:

The 10 minutes time is to completely discharge the voltage in SMPS. For some SMPS it will take 30 minutes to 1 hour and so it’s recommended to wait for an hour after the third step. If you don’t have time and need to reset it quickly, remove the power supply to motherboard from the SMPS and remove the CMOS battery. Wait for 1 minute. Place the CMOS battery back to the motherboard and reconnect the power supply from SMPS to the board. Then you can restart your computer.

Alternate method:

This is an easy and best method if you could find the 3 pin jumper which is near the CMOS battery (the position depends upon the type of mother board) and the BIOS will reset without fail,

1. Turn OFF the computer.
2. Remove the jumper from its default position (1 and 2) and place the jumper to the 2^nd and 3^rd position. 
3. Turn ON the power button which is at the front of your computer case.
4. Now wait for 1 minute.
5. Again turn OFF the computer.
6. Place the jumper back to its default position i.e., 1 and 2.
7. Turn ON the computer.
8. The BIOS will be resetted.

Note:

           Your computer will not restart properly if you have wrong jumper settings.

Why my computer date and time is changing always?

If your computer time is automatically changing every day or anytime, the CMOS battery of your computer needs to be changed.  You can replace it by opening your computer case or ATX cabinet and you will see the CMOS battery as below

 

It will look like a big watch battery. You can remove it and replace it with a new one. The voltage value and other values of the battery will be specific and so you can take the battery to the store or watch shop where you wish to purchase it. After replacing the CMOS battery, restart your computer and if your computer shows any error restart the computer again. Now you need to set the date and time.

Note:

 Replacing the battery will reset your BIOS as well which is good. Click here to know how that happen.