A BitLocker recovery key is a 48-digit number that unlocks the drive when BitLocker can’t unlock it automatically. It isn’t shown on the PC by default; it must have been saved somewhere when BitLocker was first turned on.
When the blue BitLocker screen appears, first note the Recovery key ID (the first 8 digits shown on that screen). Then check these possible locations for the matching key:
- Microsoft account (most common for home PCs)
If the HP was set up with a personal Microsoft account:
- On another device, open a browser and go to:
https://aka.ms/myrecoverykey (this opens https://account.microsoft.com/devices/recoverykey).
- Sign in with the Microsoft account used on that HP PC.
- Look through the listed devices, find the one that matches the HP, and match the Key ID (first 8 digits) with what is shown on the BitLocker screen.
- Use the corresponding 48‑digit recovery key on the locked PC.
- Work or school account (if the PC was ever joined to an organization)
If the HP was signed in with a work/school account:
- On another device, go to
https://aka.ms/aadrecoverykey.
- Sign in with the work or school account.
- Select Devices, expand the HP device, then choose View BitLocker Keys.
- Use the Key ID from the BitLocker screen to find the matching recovery key.
- Printed copy
Check any printed documents from when BitLocker was enabled. The printout shows a Key ID and the 48‑digit recovery key.
- USB flash drive
If the key was saved to a USB drive:
- Plug that USB into another computer and open the text file on it to read the 48‑digit key.
- Or plug it into the locked HP and follow the on‑screen instructions if prompted.
If the recovery key cannot be found in any of these locations and the device is not managed by an organization that can provide it, the only remaining option is to reset or reinstall Windows using the recovery options. This will remove all files on the encrypted drive because BitLocker encryption cannot be bypassed without the recovery key.
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