Microsoft has temporarily removed the Windows RT 8.1 update, designed to enable the user to update from Windows RT to Windows RT 8.1, from the Windows Store after users reported that it rendered users’ Surface tablet computers useless. Microsoft has not indicated when the update will be available again, nor has it indicated what specifically caused the devices to be bricked. Windows RT is an operating system for mobile devices using ARM microprocessors. (ZDNet)(SlashGear)