No bootable device found after Insider Update

After the system downloaded & when thru the normal blue install screens for the newest (Fall) Insider update & did the final reboot, my Dell 17-7778 indicates "No bootable device found". Running the diagnostics, the drive is there. Any suggestions?

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Hula_Baloo

https://answers.microsoft.com/en-us/insider/forum/insider_wintp-insider_install/build-16215-problems-possible-solutions/97bfb4ab-f540-4517-8eaa-eb46bc58c27e

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Don Cuthbert

Build 16215 cannot boot into Safe Mode, so that may be a potential issue during upgrade. To see if there is a workaround, you would need to boot with Windows 10 install media and try Repair your computer from the second screen. If that does not help, try again, but use SHIFT-F10 to get a Command Prompt from the first Windows setup screen. You could then try using diskpart, bootsect and bcdboot to rebuild the boot sector, System files and BCD.

Don

2012 Alienware Aurora R4 ALX
Intel i7-3960X, 32GB RAM, 250GB NVMe SSD, NVIDIA GeForce GTX 690

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ConradShull

I disabled Secure Boot in F2 Setup, and that got me through. Apparently, the Fast Ring update isn't from a "trusted source" and my Dell says "No Way!" . Hee Hee.

No bootable device found after Insider Update

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