Did and when did Disk Management stop showing all partitions ?
Here's my example, it's another SSD that contains my other W10 installation. This is a look from Skippy for instance:
Same disk from Easus Partition master:
BOOT drive with C: shows right way but looking from "normal" W10 installation that came drive shows only one partition.
I'm on build 18362.1 and my disk management is showing the same that it always has. All partitions except for the MSR partitions:
Well, Easus shows you have a little unallocated space at either end, but you only have one other actual partition. At 16MB that must be the MSR, Disk Management has never shown that as you can see on my 1809 system with an SSD:
Same comment. Of the two partitions Disk Management (by design) will never show the 16MB Microsoft Reserved (MSR) partition, shown as (Other) by Easus or MiniTool.
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