UEFI “Secure Boot” and Microsoft Windows 8: The danger for free software

“The threat is not the UEFI specification itself, but in how
computer manufacturers choose to implement the boot restrictions.
Depending on a manufacturer’s implementation, they could lock users
out of their own computers, preventing them from ever booting into
or installing a free software operating system….

We will be monitoring developments in this area closely, and
actively campaigning to make sure this important freedom is
protected. Our first step is to demonstrate that people value this
freedom, and will not purchase or recommend computers that attempt
to restrict it.