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Finding EFI system partiton of unbootable Windows OS while booted to another volume

Guest Cookie Jones1

By Guest Cookie Jones1
in Microsoft Products Support & Discussions

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Guest Cookie Jones1

Guest Cookie Jones1

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My main Windows 10 system won't boot, so I'm booted to an older Win 10 volume on the same HD.From here, I want to look at the EFI System partition of the unbootable OS. Mountvol /S will mount the EFI partition for the current OS. What if the unbootable OS has a separate EFI partition - how would I mount it? And how can I tell if it has a separate EFI partition?Disk Management snap-in shows only one EFI system partiton - presumably that's for the currently booted OS (right?) If there were a separate EFI partition for the other OS,how would Disk Management display it? Would it be labeled as

 

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