SHIFT+F10 During Windows 10 Updates Can Bypass BitLocker

  • 29 November 2016
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By Kevin Townsend on November 29, 2016
 
Windows has long had a troubleshooting feature that can be used during installs: SHIFT+F10 brings up a command prompt. While this has many advantages, it can be abused. For example, during the more frequent feature updates in Windows 10 (as opposed to the old practice of providing a distinct new OS version), pressing SHIFT+F10 gives the user admin privileges while BitLocker is disabled.
 
Windows expert Sami Laiho blogged about the issue yesterday. "There is a small but CRAZY bug in the way the 'Feature Update' (previously known as "Upgrade") is installed," he wrote. This includes the troubleshooting feature that allows you to press SHIFT+F10 to get a Command Prompt. "This sadly," he says, "allows for access to the hard disk as during the upgrade Microsoft disables BitLocker."
 
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Oooopsie...Microsoft! Now that is really not a good one to have allowed through, especially when it affects a core element of the defenses supposed to keep data safe. :(

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