Bitlocker is a security feature in Windows that uses encryption to help prevent unauthorized access to data. When Bitlocker is enabled and certain system, software or hardware changes are made on your Windows computer, you may be prompted to enter the Bitlocker recovery key.
If this is your personal computer, try to remember if you previously printed or saved the Bitlocker recovery key to a file. If you have a Microsoft personal account, sign in to https://aka.ms/myrecoverykey on another computer or your phone and check for the Bitlocker recovery key there.
Also, check with the person who first set up your computer, as the Bitlocker recovery key may have been printed or saved to a file by them, or uploaded to their own Microsoft account.
If this is your work or school computer, and you have a Microsoft work or school account, sign in to https://aka.ms/aadrecoverykey and check for the Bitlocker recovery key under Devices & activity.
You could also contact your IT Administrator to help retrieve the Bitlocker recovery key from Active Directory or Entra ID (formerly Azure Active Directory). You may need to provide your IT Admin with the Bitlocker recovery ID displayed on your computer’s screen.
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