My daughter HP Envy 4-1115dx laptop booted up with the black screen and blue banner “Selected boot image did not Authenticate – Press <Enter> to Continue.”, when I press <Enter>, the laptop shuts down. The problem was she some how hit F10 to access bios and selected the “Reset To Default” by mistake, the legacy support was disabled and the “Secure Boot” was enabled. The boot image was El Capitan OS X only supported with Legacy and Secure Boot disabled.
All I had to do was turned on the power, hit F10 to get to the bios and set Legacy support to Enabled and Secure Boot was Disabled automatically.
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- Problem with cmos battery
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- bios reset to factory-go to boot option
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- no legacy support
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- enable and save
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- warning
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- reboot and enter random number on boot screen
After F10 to save and reboot, I had to enter a 4 digit number to confirm and everything is back to normal.