Windows 10 to make the Secure Boot alt-OS lock out a reality
Windows 10 hardware must support Secure Boot and won't have to let you turn it off.
Microsoft has announced a relaxation of its "Secure Boot" guidelines for OEMs, allowing companies to sell computers pre-loaded with Windows 10 that will refuse to boot any non-Microsoft OS.
http://arstechnica.com/information-tech ... a-reality/