Does having UEFI over Legacy BIOs really make a big difference, like does it put the pc security at risk?
Also Um I have a system with Hybrid efi it has a option to backup bios to hard drive is that best kept disabled or enabled?
When it comes to security, the risk is the same I would say.
Both are just firmware.
If the bad guys find a way to overwrite the firmware with their own…
Both are doing the same.
Initializing the hardware and start the OS.
Main difference is that a BIOS is using 16 bit mode which limits the amount of code that can be read and executed.
While a BIOS has all code on the chip, EUFI is storing information in a file on a ESP partition on the drive.
I was asking myself the same question recently- there are some advantages to UEFI:
http://dontsurfinthenude.blogspot.co.uk/2017/01/efi-vs-bios.html