By Stephanie / Last update March 14, 2022

Is it possible to recover the lost partition?

“The HDD shows up as a Disk Drive in Device Manager, but it doesn't show up in File Manager. It shows up as Disk 1 in Disk Management, but as 465GB of unallocated space. I'm a bit afraid to do anything more since I'm not 100% comfortable with CMD Prompt stuff. Ideally, I could recover the partition and just mount it back as a normal drive. Is that possible?”

Many users would wonder whether a lost partition in Windows 10 can be recovered. When a partition gets lost, the operating system eliminates its information from the partition table. The partition table and boot sector are responsible for recognizing the partition.

First, you need to go to Disk Management to check the status of the lost partition. If you see the partition marked with “Unallocated”, or seemingly healthy without a drive letter. Partitions are displayed as “RAW”. In these situations, partition recovery is possible.

Why is your partition deleted or lost in Windows 10?

Deleted or inaccessible partitions are not limited only to internal hard disks but all storage devices, HDD, SSD, USB, memory cards, etc. The following is the common causes of partition loss:

  • User error: mistaken partition deletion or incorrect Diskpart clean commands.
  • Corruption: the partition table may be damaged or corrupted due to users’ errors or a virus.
  • Loss of the volume label, drive letter, or partition name.
  • Bad sectors. Your computer may not recognize it and then show the partition as unallocated space due to bad sectors.
  • Unexpectable Power failure.
  • Virus attack and malware.
  • Repartition hard drive.
  • Incompatible file system.

The top three ways for Windows 10 partition recovery

If your partition is lost or deleted in Windows 10, all the data and folders in the partition will be deleted and there is no sign of the hard drive partition in Disk Management. There are three methods you can try to recover the lost or deleted partitions. AOMEI Partition Recovery Wizard is certainly the easiest way among them. Before you start recovering your partition, there are some tips you need to notice to get good results.

Do hard drive partition recovery as soon as possible after the partition has been deleted or lost. Because it is unrecoverable once your lost data is overwritten by new data.
Do not make any new operation on the hard drive.
Do not reformat the hard disk.
Do not recreate a new partition on the unallocated space.
Do not rebuild the partition table.


Method 1. Recover deleted or lost partitions via reliable partition recovery software

If the partition is deleted and lost, a professional and reliable partition recovery tool can help you a lot. AOMEI Partition Recovery Wizard, one of the specialized features of AOMEI Partition Assistant, is created to recover lost or deleted partitions including FAT, NTFS, Ext2, Ext3, Ext4 in Windows 10, 8, 7.

AOMEI Partition Assistant Professional is a versatile disk management tool that helps you to manage disk partitions effortlessly. With stunning features, AOMEI Partition Assistant becomes one of the market-leading partition recovery products.

Disk partition manager: resize/move partition, merge partitions, split partition, format partition, allocate free space, create partition, align partition, dynamic volume management, migrate OS to SSD or HHD, etc.
Converter & wizards: convert MBR to GPT, convert dynamic to basic disk, convert NTFS to FAT32, convert primary to logical partition, disk clone, APP mover, Windows to Go creator, etc.

Step 1. Install and open AOMEI Partition Assistant Professional. To recover lost or deleted partitions in Windows 10, you can download the demo version below.

Try Demo Version Win 11/10/8.1/8/7/XP
Secure Download

Step 2. Choose Partition Recovery Wizard on the left panel and select the disk including the lost partition. Click “Next”.


Step 3. Choose a search mode. There are two kinds of search modes. It is recommended to select Fast Search the first time because it saves more time than Full Search. Then, click on “Next”.


Step 4. The software will show the list of all lost or deleted partitions. You can select the one you want to recover.


Step 5. After the partition recovery process completes, a message “congratulations” shows, and click “Finish” to exit. Then you can go to File Explorer to check the lost or deleted partitions out. Your files in the partition will be restored as well if it hasn’t been covered or overwritten by new data.


Method 2. Assign a drive letter to the lost partition via Command Prompt

If you can see the lost partition in Disk Management but marked with an asterisk, you can try to reassign a drive letter via Command Prompt to make your lost partition visible again in File Explorer. The method requires users are familiar with Command-Line.

Step 1. Press “Win + R” and type “diskmgmt.msc” in the Run window to open Disk Management to find the lost partition in Disk Management. (If a partition is deleted, the volume will be marked as Unallocated. Remember the partition size.)

Step 2. Press “Win + R” and type “CMD” to Run CMD as administrator.

Step 3. Type "diskpart" in the CMD window and press Enter.

Step 4. Type "list disk" and press Enter. You will see all disks in the computer on the list.

Step 5. Type "select disk # " and press Enter (Replace # with the number of the hard disk that contains the lost partition).

Step 6. Type "list volume" and press Enter. You will see all volumes on the disk.

Step 7. Type "select volume #" and press Enter (replace # with the number of the lost partition).

Step 8. Type "assign letter=#" and press Enter (Replace # with an available drive letter, from C to Z).


Method 3. Recover deleted partition via the disk management utility

If you are not familiar with Command Prompt, this method would be another good one because you can recover a lost partition in Windows 10 via the Disk Management utility.

Step 1. Right-click Windows Key on the Desktop, and select Disk Management

Step 2. Locate the storage device with the lost partition.

Step 3. Right-click on the lost partition and select “Change Drive Letter and Paths”.


Step 4. Click “Assign the following drive letter”.


Step 5: Click OK to proceed.


Partition deletion accidentally occurs often when using computers. There are three best ways to recover lost or deleted partitions in Windows 10. Select the way you want to recover lost partitions. It’s recommended to try AOMEI Partition Recovery Wizard to recover partition in Windows 10. If you take action as soon as possible, it can recover your partitions and data together. However, regular backups are always the best way to keep your data safe.