Question Cannot Enable Secure Boot after BIOS Update

Aug 12, 2019
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Hi,

I recently got an Asus Zenbook Pro UX550VD. One of my first ports of call was to update to the latest BIOS. After doing this it would no longer recognise my boot drive (Micron 512gb ssd). The boot options was completely blank and there was no way too add it back, it just didn't see it. I was able to get around this by disabling Secure Boot and enabling CSM in the UEFI Bios. If I try to re-enable Secure Boot, the boot drive vanishes again. There are keys in the Secure Boot options, I have tried backing up and restoring those, made no difference.

I would like to be able to re-enable Secure Boot, how can I do this without my boot drive disappearing?

Thanks.
 

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