EFI Preboot Guidelines and Windows 8 UEFI Secure Boot for HP Business Notebooks and Desktops PPS Business Notebook and Desktop - Technical White Paper

Technical white paper | UEFI Secure Boot on HP business notebooks, desktops, and workstations
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Legacy Boot Order
Notebook Upgrade Bay
Notebook Hard Drive
USB Floppy
USB CD-ROM
USB Hard Drive
Notebook Ethernet
SD Card
Dock Upgrade Bay
eSata Drive
Delete Add
When delete is selected, only those entries added by
OS/User can be deleted. i.e. OS Boot Manager,
Customized Boot.
When add is selected, the user can add a customized boot
path
Windows Vista, Windows 7, and some Linux systems don’t support UEFI Secure Boot. For these systems, enable Legacy
Support and disable Secure Boot. With Secure Boot disabled and Legacy Support enabled, note that both UEFI and legacy
boot sources are available for boot. This configuration allows for the most flexibility in booting from various devices, but at
the cost of not having Secure Boot.
The BIOS will base the boot sequence from the boot order list. If the first device on the boot order list is not bootable, then
BIOS will try the next device. The user can permanently change the boot order by changing the F10 Boot Order. For a one-
time boot order change, the user can use the Windows 8 interface to set Next Boot to a certain device. This will only be
effective at the next boot.
If the user presses F9 during POST, the BIOS will now enumerate all USB devices attached to the system and display a
dynamic F9 Boot Order list. For example, if there is one USB DVD and one USB hard disk attached to the platform and the
user disables the UEFI PXE IPV6 NIC boot, the static F10 Boot Order and the dynamic F9 Boot Order will be different. Also the
BIOS will pass the F9 Boot Order to the OS in such a case.
Figure 10. The dynamic F9 Boot Order and the static F10 Boot Order.
F9 Boot Order
[ ] Legacy support
[
✔
] Secure Boot
Boot Options
[
✔
] UEFI PXE IPV4 NIC boot
[ ] UEFI PXE IPV6 NIC boot
[
✔
] USB
UEFI Boot Order
OS Boot Manager
USB Hard Drive
Notebook Ethernet IPV4
Notebook Ethernet IPV6
Notebook Upgrade Bay
eSata Drive
SD Card
HP Hypervisor
External USB DVD
External USB CD
Customized Boot
Delete Add
F10 Boot Order
[ ] Legacy support
[
✔
] Secure Boot
Boot Options
[
✔
] UEFI PXE IPV4 NIC boot
[ ] UEFI PXE IPV6 NIC boot
[
✔
] USB
UEFI Boot Order
OS Boot Manager
USB Hard Drive
Notebook Ethernet IPV4
Notebook Ethernet IPV6
Notebook Upgrade Bay
eSata Drive
SD Card
HP Hypervisor
Generic USB Device
Customized Boot
Delete Add