Find a BitLocker Recovery Key After a Windows Update

A firmware, boot, or Windows update can change what BitLocker measures at startup and trigger recovery. This does not mean your files were deleted. Record the recovery key ID shown on the blue screen; use it to select the matching 48-digit key. Do not format the drive or reset the PC while the files matter.

Where to look for the recovery key

On another device, sign in to the Microsoft account used to set up this PC and check its BitLocker recovery keys. Match the displayed key ID; one account may store several keys. For a work or school device, contact your IT administrator because the key may be stored in your organization's management system. Also check a printed copy, a saved text file, or a USB drive where you deliberately stored the key. Do not enter a key merely because it belongs to the same computer name.

After you unlock Windows

Enter the matching 48-digit key. Once Windows starts, inspect the recent update and firmware changes, then check BitLocker status before changing boot settings again. Repeated recovery prompts warrant a check of TPM, firmware, and startup configuration. Keep a copy of the key somewhere accessible when this PC cannot boot.

Protect the unlocked files with Qiling Disk Master

Once you can read the files normally, create an independent backup. Qiling Disk Master backs up selected files; it does not discover, recreate, or bypass a missing BitLocker key.

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

Step 1. Unlock the source volume, attach a separate backup drive, and select Backup and Recovery > File backup.

Step 2. Choose the folders to protect in the source tree and select the separate destination. Check that the source is readable and the destination has enough space.

Step 3. Review the task, click Proceed, and wait for completion. Restore a test file to another folder and confirm it opens.

If no matching key can be found

Microsoft cannot recreate a lost recovery key, and file recovery tools cannot decrypt a locked BitLocker volume. Contact the administrator or device owner who configured encryption. A reset can make Windows usable again but may erase data; do not treat it as a file recovery method. See the broader BitLocker recovery prompt guide for additional precautions.

Related Articles

• Back Up Before Windows 11 26H2
  Prepare an image and store the recovery key before updating.

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