Updating BIOS on Acer laptop?

My long tech support via e-mail nightmare continues. The laptop is still under warranty meaning I have to use the mfr’s tech support. To resolve a “no battery detected” issue, they have mailed me a new battery, which did not solve it. Now they want me to update the BIOS. They gave me a download but I have not clicked the .exe file yet because it comes with this ominous warning:
“Flashing the wrong BIOS can cause harm to the system. Acer recommends that you should only upgrade your firmware/drivers if you have been instructed to do so by an Acer Customer Care representative. By using these firmware/drivers you agree to accept the possibility of product failure.”

Can anyone translate?