A very interesting question that has been circulating on the internet for awhile. Although it is more like a rumor, we thought the answer would be able to explain another interesting aspect of malware and what it has to do with BIOS.
BIOS or Basic Input Output System is a special set of codes that will give various instructions to a computer's operating system on how to interact with hardware.
When malware infects a computer it can also affect the computer's BIOS altering commands given to hardware. That's where you see your mouse moving without you barely touching it or the volume of speakers changing.
Malware cannot make instructions to hardware to explode your computer but it has the ability to overload your machine causing the fan inside your computer to overwork and thus cause the overheat.