Microsoft is at it again. First, they forced many mobile device OEMs to pay a fee for every Android device shipped. Now they want to put the stranglehold on manufacturers wishing to use ARM with Windows 8. In their infinite wisdom, Microsoft has decided that customers who purchase a Windows 8 devices with ARM architecture must not be able to load any other operating system other than what shipped with it.
Microsoft Confirms Lockdown of ARM Devices Running Windows 8 | xda-developers