Your BitLocker recovery key is a 48-digit code that unlocks your drive if you forget your password or can't use your normal login method

BitLocker is Windows' built-in encryption tool that scrambles everything on your hard drive so only someone with the right password or recovery key can read it. If you get locked out — you forget your password, your computer won't recognize your fingerprint, or your account gets corrupted — Windows won't let you access your files without that recovery key. The key is a long string of numbers, usually written in eight groups of six digits, like 123456-789012-345678-901234-567890-123456.

Microsoft stores a copy of your recovery key automatically when you turn on BitLocker, but it stores it in places most people never think to look. The key is not on your computer — that would defeat the purpose of encryption. Instead, it lives in your Microsoft account online, on a USB drive you may have created, or in a printout you might have saved.

Key Takeaways

  • Your BitLocker recovery key is stored in your Microsoft account online if you signed in with a Microsoft account when you turned on BitLocker.
  • You can view your recovery key by logging into account.microsoft.com, going to Device, and looking for BitLocker keys under Security info.
  • If you created a USB recovery key when you set up BitLocker, that physical drive holds a copy and will work even if you can't access your account.
  • If you have neither the online key nor the USB drive, you will need to contact Microsoft Support or use Windows recovery options, which may result in data loss.

Check Your Microsoft Account Online

If you turned on BitLocker while signed in with a Microsoft account (the kind that ends in @outlook.com, @hotmail.com, or @live.com), Windows automatically saved your recovery key to that account. You can retrieve it from any computer with internet access, even one that is not yours.

Go to account.microsoft.com and sign in with the Microsoft account you use on the locked computer. Click on "Security" in the left menu, then look for "BitLocker recovery keys" or "Device" — the exact wording changes depending on your Windows version. You will see a list of your devices. Find the computer you are locked out of and click it. The recovery key will appear as a long string of numbers. Write it down or take a screenshot before you leave the page.

If you do not see BitLocker recovery keys listed, your account may not have one stored. This usually means you turned on BitLocker while signed in with a local account (a username and password that only exists on that computer) rather than a Microsoft account. In that case, move to the next section.

Look for a USB Recovery Key

When you first turned on BitLocker, Windows asked whether you wanted to save the recovery key to a USB drive. If you said yes, a file called BitLocker Recovery Key was written to that drive. The file is usually named something like "BitLocker Recovery Key [date]" and contains the 48-digit code.

Find any USB drive you may have used around the time you turned on BitLocker. Plug it into the locked computer or into another computer you can access. Open File Explorer and look for a file with "BitLocker" in the name. Open it with Notepad — right-click the file, choose "Open with", and select Notepad. The recovery key will be visible as a series of numbers.

If you remember creating a USB key but cannot find the drive, check drawers, desk organizers, or anywhere you might have stored small electronics. Some people keep recovery keys in a safe or with important documents. If the drive is truly lost, you will need to use the next method.

Search Your Email and Documents

Some versions of Windows offer to email you the recovery key or save it as a file on your computer. Check the email account associated with your Microsoft account — search for "BitLocker" or "recovery key" in your inbox and spam folder. The email may be years old if you set up BitLocker a long time ago.

If you printed the recovery key, look through important documents, filing cabinets, or anywhere you keep passwords and security information. The key is usually printed as a QR code with the numbers listed below it. A photograph of the printout will work just as well as the original.

If you find the key in an email or document, write down all 48 digits exactly as they appear. Spaces and dashes do not matter — only the numbers themselves.

What to Do If You Cannot Find the Key

If you have no access to your Microsoft account, no USB drive, and no printed copy, you have limited options. You can contact Microsoft Support through account.microsoft.com or by calling the support number for your region. Be prepared to prove you own the computer — you may need to provide the product key, proof of purchase, or answer security questions about your account.

Windows also has a recovery option that lets you reset your password without the BitLocker key, but it requires you to have set up recovery options like a backup email or phone number beforehand. If you have neither the key nor recovery options set up, you may not be able to access the drive without professional data recovery, which is expensive and not always successful.

The best time to find your recovery key is before you need it. If you have access to your computer now, go to account.microsoft.com and write down your BitLocker key. Store it somewhere safe — a password manager, a safe deposit box, or a trusted family member's house. That way, if you ever get locked out, you will have it within reach.

How to Prevent Losing Your Key in the Future

If you are setting up BitLocker for the first time, Windows will ask you how you want to save the recovery key. Choose "Save to your Microsoft account" — this is the easiest option because you can retrieve it from any device with internet access. You can also choose "Save to a USB drive" and keep that drive in a safe place, or "Print the recovery key" and store the printout with important documents.

Do not skip this step. Windows will not let you turn on BitLocker without confirming that you have saved the key somewhere. If you are unsure which option to choose, saving to your Microsoft account is the most reliable method for most people.

Frequently Asked Questions

Can I use my BitLocker recovery key on a different computer?

No. The recovery key only works on the specific drive it was created for. If you have multiple computers with BitLocker, each one has its own separate recovery key. You will need to find the key for the exact computer you are locked out of.

What if I see my recovery key but it does not work?

Make sure you are typing all 48 digits correctly — even one wrong number will not work. Do not include spaces or dashes; type only the numbers. If you have triple-checked and it still does not work, the key may be corrupted or you may have the wrong key. Contact Microsoft Support with proof of ownership.

Is my BitLocker recovery key the same as my Windows password?

No. Your Windows password is what you type to log in every day. Your BitLocker recovery key is a separate 48-digit code that unlocks the entire drive if you cannot use your password. You need both to be find.

Can I change my BitLocker recovery key after I set it up?

You can rotate your recovery key through Windows settings, which creates a new one and stores it in your Microsoft account. The old key will no longer work. This is useful if you think someone else may have seen your key, but it is not necessary for routine use.

What happens if I lose my recovery key and my password at the same time?

You will not be able to access your drive without professional help. This is why BitLocker requires you to save the recovery key before turning on encryption — it is your backup plan if something goes wrong with your normal login method. If you have lost both, contact Microsoft Support when ready.