Security is the most important reason to update your computer's firmware. It is possible for malware that targets firmware to persist even after reboots or hard drive replacements. To take control of a computer, hackers are increasingly targeting firmware. Manufacturers are updating their firmware to keep up with the hackers. You can also fix bugs with firmware updates to keep your computer running at its best. 

Briefly explain the cautions when updating BIOS/UEFI firmware?