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(4 Solutions) How to Recover Lost Partition Windows 10/11

Published/Updated on Thursday, May 8, 2025

M3 Software author Wilsey Young

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Wilsey Young

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Summary: This post shows how to recover lost partition Windows 10 or Windows 11 through Disk Management, Command Prompt, or a professional partition recovery tool, iBoysoft Data Recovery for Windows. -From m3datarecovery.com

recover lost partition windows 10

You can judge whether a partition is lost on Windows by the following circumstances: The system cannot detect the partition, the partition appears as RAW or unallocated in Disk Management, and the drive letter is missing in File Explorer.

If your partition is lost and you wonder how to recover lost partition Windows 10 or Windows 11, you are in the right place. The partition recovery methods introduced in this post involve using Disk Management, Command Prompt, or a third-party tool on Windows 10.

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How to recover lost partition Windows 10 or Windows 11

You may lose your partition due to the damaged partition table, sudden power outage, virus attack, improper ejection, bad sectors, etc. Once the partition is lost on the Windows OS, it becomes unavailable for read-and-write access. Worse, you will lose all the data if the lost partition is not recovered. Here is how to recover lost partition in Windows 10 or Windows 11.

Recover lost partition Windows 10 or Windows 11 via iBoysoft Data Recovery for Windows

iBoysoft Data Recovery for Windows is a professional and intuitive recovery tool that can help retrieve deleted or lost data from various storage devices, even when they become corrupted or inaccessible.

In addition, this easy-to-use data recovery tool is highly effective in restoring lost or deleted partitions on Windows, including the BitLocker encrypted partition. Only a few steps are needed when it comes to partition recovery.

Here's how to recover lost partition Windows 10 or Windows 11 via iBoysoft Data Recovery for Windows:

  1. Download, install, and launch iBoysoft Data Recovery for Windows.
  2. Choose the Partition Recovery module in the main interface.
    iBoysoft Data Recovery for Windows
  3. Click Find More partitions at the bottom.
    iBoysoft Data Recovery for Windows
  4. Choose the hard drive where the lost partition was located and click the Next button. This tool starts scanning for the missing partitions on the selected drive.
    iBoysoft Data Recovery for Windows
  5. Select the detected partition and click Next again to check the files.
    Choose the hard drive where the lost partition was located.
  6. Right-click on the files in the lost partition and preview the content.
  7. Click the Fix Drive button to recover the lost or deleted partition.
    iBoysoft Data Recovery for Windows

Recover lost partition Windows 10 or Windows 11 via open-source TestDisk

TestDisk is a free and open-source tool primarily designed to recover lost or deleted partitions on Windows. However, green hands could find this tool hard to operate as it works through a command-line interface.

Here's how to recover lost partition Windows 10 or Windows 11 via open-source TestDisk:

 Tips: To navigate in TestDisk, use the Arrow and PageUp/PageDown keys. Confirm your choice with the Enter key. To return to a previous display or quit TestDisk, use the q (Quit) key.

  1. Download TestDisk and start TestDisk from an account in the Administrator group
  2. Choose "Create" to let TestDisk create a new log file containing technical information.
    TestDisk create new log file
  3. Use the arrow keys to select your hard drive with the lost partition, then press Enter to continue.
    TestDisk select disk
  4. Select the partition table type and press Enter to proceed.
  5. Choose "Analyse" and press Enter to check the current partition structure and search for lost partitions.
    TestDisk analyze
  6. Confirm at Quick Search to proceed when the list of partitions is displayed.
    TestDisk quick search
  7. Select the lost partition and press P to list the files. If all directories and data are correctly listed, press q to return to the list of detected partitions.
  8. Using the left/right arrow keys to switch the status of the selected partition from D(deleted) to L(logical), then press Enter.
  9. Go to the menu Write to save the partition structure, and confirm with Y
    TestDisk write
  10. Quit the tool and reboot your PC.

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Recover lost partition Windows 10 or Windows 11 via Command Prompt

If the partition is not given a drive letter in Disk Management, the File Explorer will not recognize or detect the partition. Therefore, you can recover lost partition by assigning a new drive letter through the Command Prompt.

Here's how to recover lost partition Windows 10 or Windows 11 via Command Prompt:

  1. Press the Windows+S keys to launch the Windows search box.
  2. Type cmd in the Windows search box and run cmd as an administrator.
    cmd run as administrator
  3. Input the following commands and hit the Enter key after each.

list disk
select disk # (Replace # with the number of the hard drive containing the lost partition)
list volume
select volume # (Replace # with the number of the lost partition)
assign letter=# (Replace # with new drive letter)

assign drive letter in cmd

Recover lost partition Windows 10 or Windows 11 via Disk Management

Besides Command Prompt, you can assign a new drive letter to the lost partition through Disk Management. Here's how to recover lost partition Windows 10 or Windows 11 via Disk Management:

  1. Press the Windows+X keys and choose Disk Management.
  2. Right-click on the lost partition and select Change Drive Letter or Path.
    assign drive letter in Disk Management
  3. Click the Change button.
  4. Choose "Assign the following drive letter" and select an available letter from the drop-down menu on the right.
    change drive letter Disk Management
  5. Click OK.

Conclusion

You can recover lost partition Windows 10 or Windows 11 through Command Prompt or Disk Management only when the drive letter is not assigned. iBoysoft Data Recovery for Windows can work like a charm when your partition is lost or shows as RAW. More importantly, this data recovery tool is more user-friendly than the open-source TestDisk.

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