- The issue is: there is no way to remove any System (System, Recovery, EFI) partitions using Disk Manger
- No third-party tools installed
To get the story about EFI partition, follow the link at the end of the post, I have just needed to clean the disk using built-in Windows Tools…
Let’s start: hit Win + R and type diskpart. Hit Enter
DISKPART> list disk Disk ### Status Size Free Dyn Gpt -------- ------------- ------- ------- --- --- Disk 0 Online 465 GB 1024 KB * Disk 1 Online 931 GB 0 B * Disk 2 Online 4657 GB 0 B * DISKPART> sel disk 0 Disk 0 is now the selected disk.
DISKPART> list partition Partition ### Type Size Offset ------------- ---------------- ------- ------- Partition 1 Recovery 300 MB 1024 KB Partition 2 System 100 MB 301 MB <-- EFI Partition 3 Reserved 128 MB 401 MB Partition 4 Primary 279 GB 529 MB Partition 5 Unknown 185 GB 280 GB DISKPART> sel partition 1 Partition 1 is now the selected partition.
To delete selected partition:
delete partition override
If there are more system partition, repeat last three steps. But if it’s necessary to remove all partitions, try:
DISKPART> clean DISKPART> exit
How to delete EFI partition? This page tells what is EFI system partition and why you can’t directly delete it from your computer. You’ll also learn how to delete EFI system partition in Windows 11/10/8/7 in two reliable ways.
Source: [Delete EFI Partition Guide] How to Delete EFI System Partition in Windows – EaseUS