0X80310000: FVE_E_LOCKED_VOLUME on BitLocker Drive

What's happening with error 0X80310000

This error means BitLocker locked the drive. The volume is encrypted, and Windows can't read it without the right key. Usually happens after:

• You restart the PC with a BitLocker-protected drive
• You removed the USB key that holds the startup key
• You changed hardware (like a new motherboard or hard drive controller)
• Windows update changed something in the boot process

The fix is to give Windows the correct unlock method. Let's start with the easy one.

Step 1: Unlock the drive through File Explorer (30 seconds)

This works if you still have your password or smart card.

1. Open File Explorer (Win + E).
2. Find the locked drive (it'll have a lock icon).
3. Right-click it and select Unlock Drive.
4. Type your BitLocker password or insert your smart card.
5. Click Unlock.

If that worked, you're done. The drive is accessible again. If you don't know the password, move to Step 2.

Step 2: Use the BitLocker recovery key (5 minutes)

When you set up BitLocker, Windows gave you a 48-digit recovery key. You need that. If you saved it to your Microsoft account, here's how to grab it.

1. Go to https://aka.ms/myrecoverykey on any computer or phone.
2. Sign in with your Microsoft account (same account you used on the locked PC).
3. Find the recovery key for the locked drive. It looks like: 123456-789012-345678-901234-567890-123456-789012-123456.
4. Copy the key.
5. Back on the locked PC, open a Command Prompt as Administrator.
6. Type: manage-bde -unlock X: -RecoveryPassword 123456-... (paste your key)
7. Replace X: with your drive letter. Press Enter.

If the key is correct, the drive unlocks silently. If you get an error 0X80310000 again, the key might be wrong or the drive has a different problem. Try the next step.

Step 3: Advanced – repair BitLocker metadata (15+ minutes)

Sometimes the drive is locked because the BitLocker metadata got corrupted. This happens after a failed Windows update or a sudden power loss. What's actually happening here is that the TPM (Trusted Platform Module) lost the key it stores. You need to tell BitLocker to rebuild its boot key.

1. Boot into Recovery Mode: restart the PC, hold Shift, click Restart.
2. Go to Troubleshoot > Advanced Options > Command Prompt.
3. Run: manage-bde -status to see which drives are encrypted.
4. Then: manage-bde -protectors -get X: (again replace X: with your drive letter).
5. If you see any protectors listed (like TPM or RecoveryPassword), note them.
6. If TPM looks missing or broken, disable it in BIOS (be careful – this can lock you out of other things).
7. Reboot into Windows normally. At the login screen, press Shift + Restart again, go back to Command Prompt.
8. Run: manage-bde -unlock X: -RecoveryPassword <paste your key>
9. After unlock, run: manage-bde -protectors -enable X:
10. Reboot normally.

The reason step 8 works is because you're bypassing the TPM and directly giving the recovery key. After that, re-enabling protectors tells BitLocker to trust the TPM again.

If all else fails – decrypt the drive

This is a last resort. It takes hours on a large drive. You'll lose encryption but get your data back.

1. Boot into the same Recovery Command Prompt.
2. Run: manage-bde -off X:
3. Wait. It decrypts in the background.
4. After done, you can format the drive and start fresh.

Only do this if you have a backup of your recovery key elsewhere. Without it, you can't decrypt.

Blockquote to remember

The error 0X80310000 is BitLocker's way of saying "I can't trust this environment." The quick unlock or recovery key usually solves it. TPM corruption is rarer but fixable.

Summary table

If you hit this error more than once a week, check if your TPM is failing. Some motherboard firmware updates fix it. Or disable BitLocker entirely – it's not mandatory for most users.