Accidentally Deleted Windows Partition? Fixed!

Accidentally deleted Windows partition? This tutorial shares a detailed guide to recover accidentally deleted Windows 10 and deleted disk partition with you.


By Penny / Updated on October 16, 2023

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How do I recover a deleted partition in Windows 10?


I deleted my boot partition by mistake, and I cannot boot my PC. So is it possible to restore deleted boot partition in Windows 10? Any suggestion will be appreciated. Thanks.

By deleting partitions in Windows, users could increase storage capacity. Nevertheless, have you accidentally deleted Windows partition doing this? Lack of awareness of viewing partitions/disks with Disk Management, so some of you even cannot distinguish whether the deleted partition is a boot partition or disk partition after accidental deletion.

The boot partition is essential to booting. If you fail to boot your computer, which suggests your boot partition was missing. On the contrary, it is a deleted disk partition. Both scenarios put users in danger of data loss or partition loss. If you’re one of them, read this tutorial to get an overview of the boot partition and corresponding solutions.

How to recover the accidentally deleted Windows partition?

This part offers you a detailed guide to recover accidentally deleted Windows 10 boot partitions and deleted disk partitions. Before that, let’s get into the definition of the boot partition first.

For computers, a boot partition is a volume of the computer that contains the system files used to boot the operating system. Boot partitions usually include EFI System Partition and System Reserved Partition.

The EFI System Partition (ESP) is a partition on a data storage device (HDD/SSD) that is applied by the Unified Extensive Firmware Interface (UEFI) computers.

The System Reserved Partition is a partition on a BIOS computer. The Boot Manager Code, Boot Configuration Database, and the startup files needed for BitLocker Drive Encryption are included in this partition. Most computers contain at least one hidden partition in Windows used at startup. And the system reserved boot partition is visible in most 64-bit versions of Windows. Then let’s move on.

Case A. Step-to-step to recover accidentally deleted Windows 10 boot partition

You’re not allowed to access Windows because you’ve accidentally deleted Windows 10 boot partition. Therefore, you’re supposed to make a bootable media first before recovering the deleted boot partition.

One of the most recommended third-party tools, AOMEI Partition Assistant is a good assistant for you. A user-friendly interface and step-to-step guide make it easier for you to prepare bootable media.

You’d better use a free USB flash drive because the data on the USB stick will be formatted.  
Prepare another bootable computer.
With the bootable media, the previously unbootable computer could be started normally. Then you can follow the steps of Case 2 directly to recover the deleted partitions.
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Step 1. Install and launch AOMEI Partition Assistant on a working PC, then connect the USB stick to it. Click “Make bootable media” > “Next”.


Step 2. Select “USB Boot Device”, and click “Proceed” to begin the pending operation.


Step 3. Click the “Yes” button to make a bootable media.


Case B. Four steps to recover deleted partitions

After booting your PC, you can settle to recover the deleted boot partition. Meanwhile, the last four steps are also suitable for recovering the deleted disk partition. Moreover, there’s no need to make a bootable media and change the boot order for disk partition.

Step 1. Connect the USB stick to the unbootable PC. Go to the Boot menu, and change the boot order to boot from the bootable USB flash drive.

Step 2. Go to the program interface with preinstalled AOMEI partition Assistant. Click “Partition Recovery Wizard”, and select the disk including your deleted boot/disk partition. Then click the “Next” button.


Step 3. Select “Fast Search” to detect your deleted boot/disk partition quickly. If it fails, you can try “Full Search”. Then click the “Next” button.


Step 4. After searching, all the deleted partitions (boot partition & disk partition) will be listed on the window. Click the “Proceed” button to start the recovery process after choosing your desired partition.


Step 5. After the process, click the “Finish” button to exit this window. You could go to Disk Management to confirm it.

Questions & Answers for Windows Partition

1. How to recover the EFI partition in Windows?

As stated earlier, the EFI System Partition (ESP) is a part of the boot partition. If you accidentally deleted the EFI partition, or the EFI partition is formatted as NTFS or other types of File Systems, you cannot boot the PC, either.

Therefore, the recovery cycle of an unbootable computer is to make a bootable media first and recover deleted boot partitions with AOMEI Partition Assistant. Please note that a free USB flash drive is preferable in this case.

2. Is there any way to avoid partition loss?

Is there any way to break the cycle of partition loss or data loss? AOMEI Backupper is a multifunction backup software applicable for personal and business use. AOEMI Backupper renders you many exciting features such as “Disk Backup”, “Partition Backup”, and “System Backup”. The full backup of this utility is also feasible for the boot partition, the recovery partition, and other partitions.

In conclusion

Accidentally deleted Windows partition? With the help of this tutorial, you can fix the issue “the deleted partition now won’t boot” safely. So how to recover deleted disk partitions? Everyone can utilize AOMEI Partition Assistant to recover the deleted boot partitions and disk partitions in Windows until it is overwritten.

There’s one point that deserves your attention. Creating a regular backup is a bulwark against partition/data loss as the accidentally deleted Windows 10 boot partition. So why not give AOMEI Backupper a shot? Besides backups, this utility also permits you to sync files and clone disks.

Penny · Editor
Penny works as an editor at AOMEI Technology, while she's a tester and editor for AOMEI Data Recovery Tools. She enjoys helping users with data recovery issues on Windows and iPhones using simple and practical solutions. Outside of work, she has a strong affection for pets, particularly giant pandas.