Windows 10: HELP - After last update, Windows 10 reboots to black screen "Reboot and select proper boot...

Hi everyone

I'm experiencing a problem with Windows update and can't find useful results in Google.
Don't know what version is actually present on the PC, and what is the version is going to install.

The problem is that the system, after first reboot, doesn't detect anymore my ADATA SSD Windows 10 UEFI boot option, but only the Legacy one, so it can't proceed with the update.

BIOS has always been set to "Windows 8/10" (= UEFI)
Motheboard is a random Gigabyte H110 chipset.

Tried to change boot menu pressing F12 at startup, but I can only see my SSD Legacy option, the other HDD and the DVD drive. Normally when it works I also see "ADATA Windows 10 UEFI" option.

Since it's the second time I try to make this massive update, and the result is the same (but last time I managed to recovery, don't know exactly how, with command prompt and bootsect from a USB key), I've created a recovery point in the system that can be useful to return in Windows 10's old version without problem (I wish).

Is there anything I can do BEFORE trying to install the update another time ?

submitted by /u/Mech-maniac
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:)

 

Reboot and Select proper Boot device


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Suggestions appreciated.