A:Answer A CMOS battery is crucial to maintaining date, startup, BIOS settings, and more. If your motherboard does not have a CMOS battery, you should replace it. There are three primary methods to reset your computer’s BIOS or UEFI settings: Reset internally from your device’s BIOS or UEFI menu, reset by removing or replacing the CMOS battery, or clear and reset BIOS settings by clearing your motherboard jumper. This information is in your User Manual. You can also reach out to HP Support for assistance.