UEFI's secure boot enables Microsoft to force out other operating systems in hardware: https://en.wikipedia.org/wiki/Unified_Extensible_Firmware_Interface#Secu

UEFI's secure boot enables Microsoft to force out other operating systems in hardware: https://en.wikipedia.org/wiki/Unified_Extensible_Firmware_Interface#Secure_boot_criticism https://en.wikipedia.org/wiki/Unified_Extensible_Firmware_In... (+1 for the RMS reference)