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Usually, when you successfully install Windows OS on a GPT disk of your computer, an EFI system partition (ESP for short) will be created. What is an EFI system partition and why you cannot delete it? This page will talk about what is an EFI system partition and how to remove, deleted or format EFI system partition in Windows 10/8.1/8/7/XP/Vista. And you may encounter the similar situation when you trying to delete OEM partition, recovery partitions, system reserved partition. But sometimes, you can’t remove EFI system partition in Windows 10/8.1/8/7/XP/Vista because “Delete Volume” feature is grayed out. Usually, you can easily delete a partition in Disk Management. This page talks about what is an EFI system partition, why you cannot delete EFI partition in Disk Management and how to delete or remove EFI system partition in Windows 10/8/7/XP/Vista with Diskpart command line.
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