source (en anglais):
https://www.thewindowsclub.com/windows ... xtra-disk-partition-fixedAppliquez le chapitre 3 et le chapitre 4:
3] Use Diskpart
You could use an elevated Command Prompt instead of Disk Management to shrink/remove the extra partition. Execute the following commands:
diskpart
list volume
select volume <the volume in the drive>
remove letter=X:
Exit
Here X: is the Drive letter.
This step will remove the surplus partition and resolve the issue.
4] Remove the MountPoint
Right-click on Start and select Command Prompt (administrator).
Type the command mountvol X: /D and press Enter, where X: is the Drive letter.
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