Delete EFI system partition

About EFI System Partition

The EFI System Partition (ESP) is typically used by computers that adhere to the UEFI or Unified Extensible Firmware Interface. This specific partition has been developed to ensure that the UEFI firmware will load the OS and all the rest utilities present in the system as soon as the computer boots up.
The ESP contains four main components:
1. Boot loader programs for the operating system;
2. Device driver files for all the hardware devices present and utilized by the computer during its boot time;
3. System utility programs that start running prior to booting an operating system and;
4. Data files like error logs.
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Reading here, you know ESP is vital for a normal boot. In Disk Management utility, you will find this partition has no drive letter. By right-clicking on this drive, you will see nearly all features listed in the context menu are greyed out, including “Delete Volume”. This is because ESP is protected by Windows and any faulty operation can lead to the operating system won’t boot. But if this operating system is no longer needed, how to delete EFI system partition?

How to Delete an EFI System Partition Easily

Actually, there are two ways to do this job: using diskpart or third-party partition software.
Way 1. Delete EFI Partition with Partition Manager
Using a professional disk partition manager can make it easier. Here you can employ MiniTool Partition Wizard to help you. With the Free edition, you can delete the EFI system partition when it is connected as a secondary hard drive. With the Pro edition, you can delete it on your PC in WinPE directly.

Get MiniTool Partition Wizard Pro

Step 1. Create a bootable media with MiniTool Partition Wizard Pro.
Step 2. Boot you PC from the bootable media you just made.
Step 3. When you are in, just select the EFI system partition and delete it.
Tip: You can also do this job with the free edition:
Step 1. Connect the target disk to another running OS. Then run MiniTool Partition Wizard Free to get the main interface.
Step 2. Right-click the EFI system partition and choose “Delete”.
Step 3. Click “Apply” to confirm the deletion.
Way 2. Delete EFI Partition with Diskpart
Tip: this way will remove all data on the disk. So back up key files and documents in advance.
Step 1. Connect the target disk to another running OS. Then run Command Prompt as Administrator.
Step 2. When you get the blank window, type the following commands and hit the Enter key after each:
• List disk
• Select disk n (here n stands for the disk number)
• Clean
Step 3. When you receive the message “DiskPart succeeded in cleaning the disk”, you can exit.
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You might be also interested in Solutions to Deleting Drive C, EFI System Volume, Recovery/OEM Volume, etc.


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