Depending on the guest operating system, when you use a custom configuration, the New Virtual Machine wizard prompts you to select the firmware type the virtual machine uses when it boots.

This option is only available in the New Virtual Machine wizard when selecting Windows 7 and later 64-bit guest operating systems.

Table 1. Firmware Type Options

Option

Description

BIOS

The virtual machine firmware uses BIOS when booting.

EFI

The virtual machine uses EFI when booting. See Enable EFI Support.

See also Configuring Advanced Settings for a Virtual Machine.