On Windows PCs, the UEFI Secure Boot feature generally checks to see if the low level software is signed by Microsoft or the computer’s manufacturer. When you boot a new Windows 8 PC, the Secure Boot feature in the UEFI firmware checks the operating system loader and its drivers to ensure they’re signed by an approved digital signature. Microsoft is turning the Secure Boot screws tighter, and Linux users are right to be concerned-but the issue is more complicated (and probably less disastrous) than it seems at first blush.įirst, let’s back up a little bit and look at Secure Boot and how it functioned in Windows 8. If that happens, you’ll only be able to boot Microsoft-approved operating systems on these locked-down PCs. Manufacturers will be able enable UEFI Secure Boot without giving you a manual kill switch, as they have to do with Windows 8 systems. The news sounds ominous for open-source aficionados: Windows 10 PCs are going to be locked down even tighter than ever before.
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