Write down the first 8 characters of the recovery key ID on the locked PC. On another device, look for that ID in the recovery key list for the account that set up the PC. Enter the matching 48-digit key on the locked PC.
01Match by key ID
Section linkThe ID on the recovery screen identifies the key for the encrypted drive. If the account lists several keys under similar device names, compare the ID before copying the key. Keep the full recovery key private and enter it only on the recovery screen.
02Check the account that set up the PC
Section linkFor a personal PC, open https://aka.ms/myrecoverykey on a device you trust and sign in to your Microsoft account. If someone else set up the PC or turned on BitLocker, ask them to check the account they used. Windows 11 version 24H2 and later can show a hint for the associated Microsoft account on the recovery screen.
03Check work, school and offline copies
Section linkFor a work or school PC, use https://aka.ms/aadrecoverykey and look under Devices for the PC and its BitLocker keys. If the key is hidden or the PC is managed, give your IT team the device name and recovery key ID. Also look for a printout or a copy saved to a USB drive. You can open a saved text file on another trusted computer.
04Stop before resetting if the files matter
Section linkIf you cannot find a match, check the other accounts and saved copies before choosing a recovery option. Microsoft Support cannot recreate a missing key. If the drive stays locked, erasing the drive to reinstall Windows will lose the files on it. A Windows sign-in PIN or password cannot unlock the drive at this screen.
05Keep a copy you can reach from another device
Section linkAfter you regain access, verify that your recovery key backup is accessible. If Manage BitLocker is available, select Back up your recovery key next to the relevant drive. Keep a printout or USB copy in a secure place separate from the PC. For managed devices, follow your organization's policy.