Using DiskPart to Remove a Protected Partition
In this guide we'll use the Windows DiskPart command line utility to remove a protected EFI System partition that can't be removed with Disk Management.
Getting Started
1. Open Command Prompt as Administrator
You can do this by hitting the search button in any recent version of Windows and type CMD or PowerShell. Right click on the correct result and select Run as Administrator.
2. Type DiskPart and Press Enter
3. Type List Disk and Press Enter
4. Type Select Disk 1 and Press Enter
Make sure you replace the number 1 with the number of the disk you want to modify.
5. Type List Partition and Press Enter
6. Type Select Partition 1 and Press Enter
Make sure you replace the number 1 with the number of the partition you want to modify.
7. Type Delete Partition Override and Press Enter
This will delete the protected partition.
8. Verify Results
If you open the Disk Management application, you can confirm that the previously protected EFI partition is now Unallocated, and a new volume can be created.
