During WinHEC (Windows Hardware Engineering Conference), Microsoft announced that PCs with Windows 10 and UEFI must ship with Secure Boot enabled by default. Secure Boot is a feature to protect PCs from malware which can infect the OS boot loader to load itself at the earliest stage of booting. What Secure Boot does it allows only a Microsoft-verified / signed boot loader to be used. So boot loaders that are not signed can no longer boot other operating systems like Linux. With Windows 8, Microsoft had not mandated that Secure Boot be enabled by default. With Windows 10, now hardware manufacturers (OEMs) must enable it by default if they want Windows logo certification, and it is up to the OEM to decide whether they even want to give you the ability to disable Secure Boot. This is an extremely alarming situation as you can potentially be locked out of using other operating systems thanks to Microsoft. Here is what you should do to avoid this.
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