installing UEFi-based Microsoft Windows Vista SP1 (x64) on HP EliteBook and Compaq Notebook PCs

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Now the File Explorer will list the directory structure of the UEFI boot portion of the

Windows Vista SP1 Installation DVD. Navigate to the \EFI\BOOT directory, and

select Bootx64.efi. This will clear the screen and present the message, “Press

any key to boot from CD or DVD…”.

Step 3: After Windows Setup is launched from the install media, the Windows

Vista SP1 installation process for either UEFI or BIOS configuration is the same.

The difference in the installed system after Setup completes is the hard disk partition

format uses the GPT format with UEFI enabled, and the Windows boot environment

uses a UEFI version of the Windows boot manager. Without UEFI enabled, the

installed operating system uses the MBR format for hard disk partitions and a BIOS

version of the Windows boot manager. If the user wants to install UEFI-based

Windows Vista SP1 on a hard disk already formatted in MBR, the warning

message “Windows cannot be installed to this disk” would appear. The user must

delete all partitions before start the installation. The same is true in the reverse

scenario if the user wants to install BIOS-based Windows Vista SP1 on a hard disk

already formatted in GPT. See Figure 6.

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