bit locker key

A BitLocker recovery key is a 48-digit key required when Windows detects a security-related change, such as some hardware, firmware, or software changes after an update.

Use the recovery key ID shown on the BitLocker screen first. Note the first 8 digits of that ID, then check these locations for the matching key:

1. Microsoft account
   • On another device, open: https://aka.ms/myrecoverykey
   • Sign in with the Microsoft account used on the laptop.
   • Find the recovery key that matches the key ID.
2. Work or school account
   • If the laptop was ever signed in with an organization account, open: https://aka.ms/aadrecoverykey
   • Sign in, select Devices, expand the device, and select View BitLocker Keys.
3. Printed copy
   • Check any papers saved when BitLocker was turned on.
4. USB flash drive
   • If the key was saved to USB, connect it and follow the prompts, or read the text file from another device.
5. Another person’s account
   • If someone else set up the laptop or turned on BitLocker, the key might be stored in that person’s Microsoft account.

Important facts:

• Microsoft Support cannot retrieve, provide, or recreate a lost BitLocker recovery key.
• There is no supported way to bypass the BitLocker recovery screen without the correct key.
• If the key cannot be found, the remaining option is to reset the device using Windows recovery options. This removes all files.

If the device is managed by an organization, contact the IT department because they might have the recovery key.

• Find your BitLocker recovery key | Microsoft Support
• BitLocker overview | Microsoft Support