BIOS can be reset to its default values by using reset to factory defaults option in the BIOS screen. This is the easiest way to restore your BIOS to its factory settings.
Steps to Reset your BIOS
1. Switch ON your computer or restart your computer if it’s already switched ON.
3. Select the option which says “Restore Factory Settings” or “Load Setup Defaults” in the BIOS screen as shown in the image.
4. Then select “Save and Exit” to save your default BIOS settings before exiting the BIOS screen.
5. Your computer will be automatically restarted, if not restart your computer for the BIOS settings to get reflected.
Note: Sometimes the BIOS cannot be reset by using the BIOS screen option, due to some virus attack or malfunction settings. In that case, check Three Ways to reset your BIOS for other ways to reset your BIOS.