The 48-digit BitLocker recovery key is usually found in one of a few places: your Microsoft account, your work or school account, a printed copy, a USB drive, or a saved text file. For most personal devices, Microsoft says to sign in at aka.ms/myrecoverykey and match the key ID shown on the recovery screen.

Where to look

  • Microsoft account: check the recovery key page for the account used on the PC.
  • Work or school account: if the device was managed by an organization, the key may be in that account; Microsoft points users to aka.ms/aadrecoverykey.
  • Printed copy: look for any paper or PDF you may have saved when BitLocker was turned on.
  • USB drive or text file: some users save the key to removable media or as a .txt file.

What to match

The recovery screen usually shows a Key ID. Use that ID to find the matching 48-digit key in your account records, because the correct entry is tied to that ID. If the device belongs to a company or school, IT may be the only place that can retrieve it.

Important detail

Microsoft’s guidance is to use the recovery key that matches the device and Key ID exactly; entering the wrong 48-digit key will not unlock the drive. If you do not see any saved key in your personal account, the most likely next place is the organization that manages the device.

TL;DR: Start with the Microsoft account recovery page, then check any work/school account, printed papers, USB drives, or text files where the key may have been saved.