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Fall Creators Update made a strange new volume appear

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#1
For some reason, Windows Fall Creators update caused a new volume to appear, but only shows in Windows defrag/optimize utility - I can't find it anywhere else. It's called \\?\Volume{15014195-6a1d-4599-b032-bba49f32a765}\ - when I click on it, the analyze and optimize buttons fade out. Obviously some kind of glitch, but annoying just the same. Anyone else seeing a new volume after the update?
 
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#2
EFI System volume. A fat partition necessary for boot on UEFI.

It's always been there, just not had an entry before.
 
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#3
EFI System volume. A fat partition necessary for boot on UEFI.

It's always been there, just not had an entry before.
Thanks, it just never showed in defrag utility before, so I wondered WTF? It'll probably disappear next major update...
 
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#4
I can confirm that the same volume was visible to me on the older update. And it's still visible now.
 
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#5
You can mount the partition with command line if you want to see what's in it.
 

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#6
Windows is supposed to/usually hides it. It may have gotten orphaned somehow.