No bootable device (sometimes!)

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I changed bios settings on my Vostro desktop windows 10, needing to boot a live usb Linux session. Afterwards I changed the settings back, and on booting get “no bootable device”. Now it gets weird.

I look at all bios settings, reboot, nope (ie “no bootable device”)

I select to recover bios factory settings, look through and they seem unchanged, but it boots fine.

I restart: boots fine.

I shut down and restart with “fast restart” enabled, and “no bootable device”

i shut down without fast restart enabled and it boots fine.

I really really want to know what’s going on!

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best to disable fast start as it causes all sorts of issues when troubleshooting.
as is evident from your post.
This article will explain further: how-disable-windows-10-fast-startup
It’s more of a nuiscance than a help IMO (especially when distro hopping)

Windows - commercial by definition and now function...

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Yep, have done. But I really want to know why this happens. What’s pointing the boot code to the wrong place on fast startup? Or is it?

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