Did you forget the BIOS password and want to Reset the BIOS settings – You’ll need to remove the BIOS battery from the motherboard for 5 mins and turn on the computer again. This might not be an easy option for all. Here is CMOS De-Animator v2, a free, easy to use app to reset the BIOS settings from Windows itself. This is designed to run on all 32-bit and 64-bit Windows operating systems except Windows 95 and Windows NT 3.51; for these old systems you will have to use De-Animator 1.0.
CMOS De-Animator v2 is a service utility which allows you to invalidate the checksum of your system’s CMOS memory from Windows. This will reset all settings to default and clear any stored BIOS passwords upon re-start. This has a graphical interface and CMOS-backup options – clear, save or restore the CMOS RAM.