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You can disable Secure Boot by restarting your PC and opening the Unified Extensible Firmware Interface (UEFI).
When Secure Boot is enabled, it is initially placed in "setup" mode, which allows a public key known as the "platform key" (PK) to be written to the firmware. Once the key is written, Secure Boot enters "User" mode, where only UEFI drivers and OS boot loaders signed with the platform key can be loaded by the firmware.
A boot menu in Windows 7 showing options to start Ubuntu, which was added by the Wubi installer. Wubi adds an entry to the Windows boot menu which allows the user to run Linux. Ubuntu is installed within a file in the Windows file system (c:\ubuntu\disks\root.disk), as opposed to being installed within its own partition.
The earliest work directed toward standardizing an approach providing mandatory and discretionary access controls (MAC and DAC) within a UNIX (more precisely, POSIX) computing environment can be attributed to the National Security Agency's Trusted UNIX (TRUSIX) Working Group, which met from 1987 to 1991 and published one Rainbow Book (#020A), and produced a formal model and associated ...
Concerns have been raised that OEMs might ship systems that do not allow users to disable secure boot or install signing keys for alternative operating systems. [ 21 ] [ 22 ] Such computers would be unable to boot any non-Windows operating system (unless that operating system was signed and its keys included with the computer), [ 23 ] further ...
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In a post discussing secure boot on the Building Windows 8 blog, Microsoft developer Tony Mangefeste indicated that vendors would provide means to customize secure boot, stating that "At the end of the day, the customer is in control of their PC. Microsoft's philosophy is to provide customers with the best experience first, and allow them to ...
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