Be careful with any settings that mention EFI or BIOS directly. Looks like your new system may support both natively.

BIOS = The old 80s era way to boot a PC, designed for the IBM PC and cloned by everyone.

EFI/UEFI = Newer 2000 era way to boot a PC, designed for a more modern era.

Flipping this to the other mode (not sure which mode the shop set it as) will likely render Windows unbootable. The basic layout of the disk (MBR/GPT), and the way an OS has to boot is entirely different between the two.