How to Get Back a Lost Partition in Windows

A lost partition may appear as unallocated space, RAW, missing drive letter, or an unknown partition. The safest response is to stop writing to the disk.

Understand the problem

Lost partitions can result from accidental deletion, failed resizing, partition table damage, malware, or disk errors. Recreating the partition before recovery can overwrite important records.

• Confirm the disk, partition, file system, Windows version, boot mode, or update state before making changes.
• Back up or recover important files before conversion, deletion, formatting, cleanup, reimage, or boot repair.
• For boot-related work, check BIOS or UEFI mode, boot order, system partition status, and recovery media first.

Use Windows built-in tools

Check the disk carefully.

1. Open Disk Management and note the disk number, size, and missing area.
2. Do not initialize, format, or create a new volume on the lost partition space.
3. Assign a drive letter only if the partition still exists and looks healthy.
4. Recover files first if the partition is deleted, RAW, or unallocated.
5. Recreate the partition only after important files are safe.

Use Qiling tools for guided steps

Deep Data Recovery

Recover files from a lost, deleted, or unallocated partition before rebuilding it.

• Free Download
• Windows 11/10/8.1/8/7, 100% Secure

Function. Recover files with Fast Scan

Step 1. Stop writing new data to the disk area where the partition was lost. If possible, install Deep Data Recovery on another drive.

Step 2. Launch Deep Data Recovery and choose Fast Scan first. Fast Scan can locate recently lost files before deeper partition recovery is needed.

Step 3. Select the disk area where the partition was lost as the scan location. If the exact folder is missing, scan the whole partition.

Step 4. Wait for the scan to complete. Use file type, name, path, and date filters to narrow the results.

Step 5. Preview files, select the items you need, and recover them to another disk or external drive.

Function. Create a partition with clear settings

Step 1. Back up important data on the disk after recovery. If no unallocated space exists, shrink a partition first.

Step 2. In Qiling Disk Master, right-click unallocated space on the disk after recovery and choose Create Partition.

Step 3. Set the size, drive letter, file system, and label for a replacement partition for restored data.

Step 4. Check the preview and click Proceed. After completion, confirm the partition in File Explorer.

Check the result

After recovery and rebuild, open the restored files and check Disk Management for a healthy partition with the correct file system.

Related Articles

• Recover Partition Table
  Recover files and repair partition table problems after a partition disappears.
• Unallocated Partition Recovery
  Recover files before creating a new volume in unallocated space.

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