How to Recover Deleted or Lost Partitions in Windows 10/8/7?

Position: How Tos - Data Recovery - How to Recover Deleted or Lost Partitions in Windows 10/8/7?

Are you look for a way to recover deleted or lost partitions in Windows 10? Accidentally deleting a partition is a nightmare when it contains important files. This article explains why deleted partitions are recoverable, how to restore deleted partition, as well as how to recover files from deleted partitions in Windows 10/8/7. DiskGenius is the best partition recovery software that enables you to locate deleted or lost partitions and mount them into system, so that you can access these partitions in Windows like other generic volumes.

DiskGenius - Effectively performs file recovery, lost partition recovery, RAW drive recovery, etc.

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About recovering deleted partitions in Windows 10

What is partition loss issue?

Disk partitioning is a good practice, for it divides a disk into one or more logical volumes, enabling you to manage files with efficiency and security. Windows treats each partition as an independent drive, so you can separate OS and personal data on different partitions, for example, you can create two or more partitions on hard drive, one for Windows and the others for photos, videos, or documents. Once a system crash occurs, your data won't get affected. Partitions can be created during Windows installation or by disk management and third-party partition manager software. However, sometimes a partition may disappear, leaving unallocated disk space.

Just like any other type of file, partitions can get lost due a variety of reasons and partition deletion occurs frequently. You can intentionally delete a partition in Disk Management or using a third-party partition manager when reinstalling OS or you just want to re-arrange disk space. Besides, a partition can also be deleted accidentally without your knowledge or deleted by virus. Whatever the reason, you will get unallocated disk space and lose everything in the partition.

Example: Last night, I was trying to reinstall Windows 10 on a new SSD but end up with accidentally deleting all partitions from my external hard drive. It was a 3TB disk and partitioned into 3 volumes: an ext4 partition, a NTFS partition and an exFAT drive. I am not sure how they get deleted. I mean they might be deleted by either Refus or Windows Media Creation tool, for I didn't aware that until Windows installation completed. Is there any way to restore lost partitions to their original status? Please!

Is it possible to recover deleted or lost partitions in Windows 10?

For the most part, deleted partitions are recoverable. You must be wondering why it is possible to restore lost partitions. Here is a simple explanation: when a partition gets deleted, operating system only removes its records from partition table without wiping disk space immediately. Partition table stores information for partitions, including partition type, size, starting and ending sector, file system etc. When such information gets deleted from partition table, the corresponding disk space turns to unallocated and Windows won't be able to locate the partition, and thus you cannot see it in File Explorer or Disk Management as well. Thanks to the disk space is totally untouched after deletion, you stand a chance to find the missing partition using effective partition recovery program.

Here are some points you should pay attention to make sure lost partition recovery can be carried out successfully.

  • Do not use the hard drive when you realize partition gets deleted, because the more you use the disk, the more chance of overwriting data and the less chance of restoring deleted partition and data.
  • Do not make changes to partition table. It will be difficult to restore lost partitions once partition table gets modified or massed up, thus do not try these operations: create new partition on the unallocated disk where you want to restore partitions, repartition disk, resize partition, convert partition type, convert partition table type, etc.
  • Do not try any manual methods. Some guides advised to restore partition by way of CMD commands or modifying registry, which has been proved not only infeasible, but also possible to cause further damage.

What is the best partition recovery software?

What is the best partition recovery software free download full version in Windows 10/8/7? DiskGenius is recommended! DiskGenius is professional data recovery and disk partition software, and it is effective in dealing with all sorts of partition recovery issues. When recovering deleted or lost partitions, the searching engine works by way of looking for partitions and save them to partition table, so that you can access lost partitions in File Explorer directly after the recovery completes. Besides, it supports to recover lost or deleted BitLocker drives and EXT4/3/2 partitions in Windows 10/8/7/. More features on partition recovery:

  • Recover lost or deleted partitions from all storage devices, such as HDD, external hard drive, SSD, USB flash drive, memory card, virtual disk, RAID, etc.
  • Recover files from RAW drive: files and folders can be recovered from RAW or unformatted partition with original names quickly.
  • Recover formatted partition: recover data from formatted or reformatted drive on both MBR and GPT disks.
  • It enables users to create bootable USB so that lost partitions can be recovered when Windows won't boot. More features about partition recovery.

Guide #1: How to recover deleted partition via searching for lost partitions with DiskGenius?

The step-by-step guide of recovering lost and deleted partitions

Step 1. Download and install DiskGenius.

Free download DiskGenius free trial version if this is the first time you use this software. Next, install it on your computer, and make sure do not install it to the disk where you want to undelete partitions.

recover deleted partition windows 10

Step 2. Select unallocated disk space and click Partition Recovery button. After Search for Lost Partition window shows up, you can click Start button to search for lost partitions.

You can easily locate the unallocated disk space in the software, for it is marked with Free and shown in grey; if you want to restore lost partitions after repartitioning disk, you can simply select the disk on the left pane.

On the Search for Lost Partitions window, you can set searching ranges on your own, for example, you can specify cylinder range if you know the exact place of lost partition, by which you can rapidly find lost partition.

recover deleted partition windows 10

Step 3. Reserve or Ignore partition.

You need to choose Reserve or Ignore each time a partition is found during the scanning process: choose Reserve when the found partition is the one you want to restore, and click Ignore if the found partition is not correct. File preview is available during scanning, by which you can easily identify if found partitions are correct.

Note: partitions reserved here are saved to memory instead of partition table, and you need to manually save partition table after scanning to get partitions restored.

recover deleted partition windows 10

Step 4. Click OK when scanning completes.

recover deleted partition windows 10

Step 5. Save lost partition to current partition table: Disk > Save Partition Table, as follows.

After saving partition table, those partitions you reserved during scanning will be assigned drive letters and show in File Explorer.

recover deleted partition windows 10

If you do not want to save lost partition to partition table, you can copy wanted files to another disk: choose files you want to recover > right-click on data > Copy To.

recover deleted partition windows 10

A video tutorial on recovering lost partitions in Windows 10

How can I recover deleted and lost partitions if Windows won't boot?

How to recover deleted partitions when Windows won't boot? There is only one extra step you need to do, i.e. creating a bootable USB or connect the disk to a working computer. Here is how to create a bootable USB disk:

Step 1. Connect a USB flash drive to a computer which runs Windows 10/8/7. Then Launch DiskGenius free edition.

Step 2. Choose Create WinPE Bootable USB Drive of DiskGenius after clicking Tools menu, as below:

recover deleted partition windows 10

Step 3. Select the inserted USB drive from the dropdown list and click OK button. Wait for a while and the bootable drive will be created.

recover deleted partition windows 10

Step 4. Use the bootable USB to boot the crashed computer.

Insert the USB drive to the unbootable computer and press power button, then hit the button prompted on the screen to enter BIOS. The specified key might be F2, F10, De, etc. which mainly depends on the motherboard brand of your computer. In BIOS, you need to change boot sequence in order to make computer boot from the USB drive. Then save changes and exit. After that, computer will restart and boot from the USB drive.

recover deleted partition windows 10

Step 5. Recover lost or deleted partitions using DiskGenius WinPE edition.

Once your computer boots from the USB drive, DiskGenius WinPE edition will be launched automatically. Then you can perform lost partition recovery following steps just talked about above.

Guide #2: How to recover files from deleted partition or unallocated disk space?

Apart from searching for lost partitions, you can also perform file recovery on unallocated disk space. In this way, you can find lost files as well as partitions after scanning completes. Let's see how to recover files from deleted partition and unallocated disk space.

Step 1. In DiskGenius, select the unallocated disk space and click File Recovery button to open Recover files dialog box, as follows:

recover deleted partition windows 10

Step 2. Click Start button to scan selected disk space for lost data. Then wait for the scanning to complete.

Step 3. Preview lost files to locate wanted files in scanning result.

When scanning finishes, you can preview files of this deleted partition and check if they can be still recoverable.

recover deleted partition windows 10

Step 4. Copy wanted files to a secure location.

Select files you need to recover, click Copy To, and you can specify a location on other partition/disk to store these recovered files.

recover deleted partition windows 10

FAQs on recovering lost partitions

How to recover deleted partition using Windows 10 CMD?

Windows CMD gets back missing partition through the command assign letter. This command assigns a drive letter to a partition which is not lost but only invisible for system due to the lack of a drive letter. Thus, this CMD method won't work if the partition has been deleted. In this case, it is recommended to use partition recovery software to restore lost partition.

How can I recover lost partitions if Windows 10 won't boot?

To recover lost partitions from computer that won't boot, you need to create a bootable USB first with DiskGenius or connect the crashed disk to another computer. After that, you can run DiskGenius to search for and restore lost partitions.

How do I recover lost partition on my external hard drive?

Here is a brief summary of recovering lost partitions from an external hard disk:

  • Connect the external hard drive to a Windows computer which installs DiskGenius.
  • Launch DiskGenius and use Partition Recovery function to search for lost partitions.
  • Save lost partitions to partition table.

For detailed steps, please refer to this guide: How to recover lost partitions on external hard drive?

Final Words

In this tutorial, we discussed what is partition loss issue, why partition recovery is available, how to recover deleted partitions in Windows 10 as well as how to recover files from deleted drive. The recovery does not require complicated steps and you can do it your own. Anyway, do create backups for important data to avoid any data loss issues.

More guides on lost partition recovery


DiskGenius - The best partition recovery software to undelete partitions and recover RAW drive in Windows 10.

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