[kevingadd]

Isn't it a completely optional feature? Otherwise, Windows 8 would not work on any pre-Secure Boot PCs.

[tango76]

The article states that "According to Microsoft’s presentation at //BUILD/2011, Secure Boot will be “Required for Windows 8 client”"

[mjg59]

For machines that adhere to the Windows 8 logo program. Windows 8 itself will still boot on BIOS, let alone UEFI systems without secure boot.