Need to locate the bitlocker recovery key for a new laptop that did a bios update.

Open the direct BitLocker recovery-key page from another device in a private/incognito browser window, then match the key there to the Recovery Key ID displayed on the laptop.

Retrieve the key

1. On the laptop’s BitLocker screen, write down the first eight characters of the Recovery Key ID. This identifies the correct key; it is not the 48-digit recovery key itself.
2. On a phone, tablet, or another computer:
   • Temporarily disconnect any VPN.
   • Open an InPrivate/incognito browser window.
   • Go directly to https://account.microsoft.com/devices/recoverykey.
3. Sign in with the Microsoft account used when the laptop was first configured.
4. If multiple keys appear, select the 48-digit recovery key whose Key ID matches the ID shown on the laptop.
5. Enter that 48-digit key on the BitLocker screen. Microsoft documents this account lookup and Key ID matching process here: ^1^.

If the page still produces an error, switch to another browser or network—for example, connect the second device to a mobile hotspot. This resolved the same recovery-site loading/sign-in problem in a closely matching case.^2^

If the key is not in that account

Check these locations in order:

• Another Microsoft account: Try any account that may have been used during the laptop’s initial setup. If somebody else configured it, the key may be stored in that person’s account. On Windows 11 version 24H2, the recovery screen may show a hint identifying the associated account.^1^
• Work or school account: If the laptop was ever connected to an organization, open https://aka.ms/aadrecoverykey, sign in, select Devices, expand the laptop, and choose View BitLocker Keys. Contact the organization’s IT department if that option is unavailable.
• Printed copy: Check paperwork stored with the laptop or other important documents.
• USB flash drive: Check USB drives for a text file containing the recovery key.

In every case, match the saved key’s ID to the first eight characters shown on the recovery screen before entering it.

Important precautions

Do not clear the TPM, reset the PC, reinstall Windows, or make speculative BIOS/Secure Boot changes while files on the laptop are still needed. The BIOS update can cause BitLocker to request recovery because firmware or hardware-related startup measurements changed, but the immediate supported recovery action is to enter the matching 48-digit key.^1^

Microsoft Support cannot retrieve, provide, or recreate a missing BitLocker key. If no matching key exists in any account, printout, or USB backup, the remaining supported option is to reset the device, which removes its files.^1^

After successfully reaching Windows, back up the recovery key somewhere separate from the laptop so it remains available after future firmware changes.^3^

References

1. Find your BitLocker recovery key | Microsoft Support
2. BitLocker recovery site aka.ms/myrecoverykey is not working - Microsoft Q&A
3. Back Up Your BitLocker Recovery Key | Microsoft Support