BitLocker has safeguarded our sensitive data and vital files for over a decade and a half since Windows Vista. While it has significantly evolved since 2006, this drive encryption service isn't perfect. Users often encounter errors with the tool, and BitLocker doesn't always work as it should.

One of those pesky errors states that "BitLocker could not be enabled. C was not encrypted." So, what is the error about, what's causing it, and how can it be fixed? Keep reading, and we'll answer these questions in a bit.

In this article
    1. Case 1
    2. Case 2
    1. Method 1: Turn on the Automatic BitLocker Drive Encryption Service
    2. Method 2: Disable and Enable BitLocker
    3. Method 3: Reinstall TPM Drivers
    4. Method 4: Convert Disk to GPT
    5. Fix 1: Check Your PC's Configuration
    6. Fix 2: Check The USB
    7. Fix 3: Update Your BIOS

What Is the "BitLocker Could Not Be Enabled" Error?

While enabling BitLocker is relatively straightforward, and the encryption feature usually works well, some users also encounter issues during the process. If you're one of the unlucky users who've seen the "BitLocker could not be enabled. C was not encrypted." error, we understand your frustration. But what does the error mean, and what's causing it?

Causes of the "BitLocker Could Not Be Enabled" Error

The BitLocker could not be enabled error typically manifests through two error messages, which also point you to the cause of the issue. There are two distinct problems:

Case 1

error with the tpm

One of the BitLocker errors recognizes the existence of TPM, indicating a communication failure between the BitLocker and the TPM chip.

Case 2

bitlocker could not be enabled error

The other BitLocker could not be enabled error states that you should check whether TPM is enabled in your BIOS, and this often occurs when you enable BitLocker with TPM.

How to Fix the "BitLocker Could Not Be Enabled" Error

Most BitLocker errors can be smoothly handled when you know what solution to apply to what problem. We've included an easy-to-use table to match the error with the corresponding solution. Below are also the step-by-step guides for each solution.

BitLocker Error 馃搶Methods 馃搩Steps
Case 1 Method 1: Adjust the BitLocker Service to Start Automatically
Method 2: Disable and Enable BitLocker
Method 3: Reinstall TPM Drivers
Method 4: Convert Your Disk to GPT
Use the Services tool to adjust the service's settings, turn BitLocker off and back on, uninstall TPM drivers through the Device Manager, or use Disk Management to convert your disk to GPT.
Case 2 Fix 1: Check Your PC's Configuration
Fix 2: Check the USB
Fix 3: Update BIOS
Confirm whether your PC meets the minimum system requirements for enabling BitLocker, ensure the USB drive works as it should, or update the BIOS by downloading the latest version from the motherboard's website.

Method 1: Turn on the Automatic BitLocker Drive Encryption Service

BitLocker runs as a background service in Windows. However, the operating system may sometimes delay starting this service, which can cause one of the abovementioned errors. To fix it, you must ensure that the BitLocker Drive Encryption Service initiates automatically. Here's how:

  1. Press the Windows + R keys to open the Run command and type in services.msc to launch Windows Services.
  2. Locate the BitLocker Drive Encryption Service, right-click it, and select Properties.
    find the bitlocker drive encryption service
  3. Change the service's startup type to Automatic, hit Apply, then OK.
    change the startup type to automatic

You may be prompted to restart the PC, but even if you aren't, a restart is highly recommended, after which you can check whether the service is running.

Method 2: Disable and Enable BitLocker

We often forget the power of a simple restart when fixing various software bugs, yet disabling and reenabling BitLocker works wonders. You can follow these steps to complete the action:

  1. Navigate to Control Panel > System and Security > BitLocker Drive Encryption.
  2. Locate the drive with the BitLocker encryption on, and click Turn off BitLocker.
    update the bios
  3. Follow the instructions, input the password, and turn the encryption off.

Once BitLocker finishes, restart the PC and follow the same steps to turn the encryption back on, this time clicking Turn on BitLocker. The error should be gone.

Method 3: Reinstall TPM Drivers

There's a chance that your computer's TPM drivers are outdated, which can also cause the BitLocker error. Fortunately, updating them is effortless, and you can follow these steps:

  1. Tap the Windows key and search for Device Manager.
  2. Open the tool and navigate to Security Devices.
  3. Select the nested Trusted Platform Module, right-click it, and click Uninstall device.
    uninstall tpm drivers

Once you restart the PC, Windows should automatically reinstall the TPM driver, but running Windows Update afterward is also highly advisable.

Method 4: Convert Disk to GPT

While the chances of your disk using the older MBR partition scheme are relatively low, especially if you're using Windows 10 or 11, it's always possible. In that case, you'll need to convert your disk drive to GPT, the newer partition scheme, which will let you use TPM and enable BitLocker without an issue. Here's how:

  1. Right-click on This PC and navigate to Manage > Disk Management.
  2. Find the disk drive you want to convert and delete all its partitions by right-clicking and selecting Delete Volume.
  3. Once the entire drive becomes Unallocated, right-click it and select Convert to GPT Disk.
    convert the disk to gpt

You'll see the option if the drive has an MBR partition scheme. However, if it's already a GPT disk, you'll see "Convert to MBR disk," so there's no need to proceed.

Remember that converting the disk to a different partition scheme is similar to formatting. The process will wipe everything off the drive, and you'll lose files. However, it's worth noting that your data is still recoverable even if you've already gone ahead with this action without a backup. All you need is the right tool.

Wondershare Recoverit is one such tool, and it'll effortlessly recover your lost files after converting the disk to GPT. This superb data recovery tool can handle hundreds of situations like accidental deletion, formatting, viruses, malware, disk conversion, system crashes, errors, etc.

Wondershare Recoverit
  • Manages over 500 data loss situations, such as deletion, formatting, and disk corruption.
  • The user-friendly interface allows you to recover data in just a few clicks.
recoverit boxrecoverit logo

Using the software is incredibly straightforward, but we've also included the steps. You'll need to do this:

  1. Launch Wondershare Recoverit, choose Hard Drives and Locations, and click on the drive you've just converted.
    wondershare recoverit interface
  2. The app will automatically scan the location.
    scan for lost files
  3. You can add keywords and filters like file size and type.
    adjust filters and add keywords
  4. You can also preview the found files.
    preview the found files
  5. When ready, hit Recover to save the found data.
    save the recovered data

With a tool like Wondershare Recoverit, disk conversion is not a problem, and you have nothing to fear if you've hastily done it without a backup.

These are four methods for Case 1. If they don't work for you, let's have a look at Case 2 and its fixes.

Fix 1: Check Your PC's Configuration

While not particularly resource-heavy, BitLocker has some minimum system requirements for enabling the service. Before turning the BitLocker encryption on, you should check if your PC meets these requirements:

  • a minimum partition size of 350MB
  • a disk drive partitioned into at least two partitions
  • an inactive partition

Here's how to check that:

  1. Navigate to File Explorer > This PC.
  2. Find the partition you want to turn BitLocker on and check its size.
  3. Follow the steps from Method 4 to go into Disk Management and check whether your disk drive is partitioned into two or more partitions.

Finally, the partition you're enabling BitLocker on must be inactive. That means enabling BitLocker on any partition other than the C drive, which houses the Windows operating system, is possible. In the case of C drive, you'll likely need to reinstall Windows and reallocate partitions to enable the BitLocker service.

Fix 2: Check The USB

Users often encounter the pesky "BitLocker could not be enabled" error when enabling BitLocker To Go for a USB drive. Fortunately, troubleshooting the culprit here is incredibly straightforward. To resolve it, you'll need to check the USB drive and ensure it's working as it should, as a faulty USB drive, shorted USB port, or disabled USB at boot can cause the error.

  1. Plug your USB flash drive into a different port and check whether it's showing up inside File Explorer.
  2. Use a secondary USB flash drive to check whether your USB port works as it should.
  3. Restart your PC and press the adequate keyboard key to go into BIOS. (You can find information about which key it is by searching for your motherboard brand's BIOS key.)
  4. Locate USB settings and ensure that USB devices are loaded during boot.

It's worth noting that USB settings for each motherboard manufacturer require different steps. Thus, searching for model-specific instructions on enabling USB devices during boot for your specific motherboard brand and model would be your best option.

Fix 3: Update Your BIOS

BIOS updates are essential to the computer's health, and running the latest version is recommended, as it can also clear the BitLocker error. Let's dive straight into updating it:

  1. Prepare an empty USB stick and go to your motherboard's website.
  2. Navigate to the support page, input your motherboard model, and download the latest BIOS version from the Drivers Download page.
  3. Unzip the file and place it on an empty USB stick.
  4. When ready, restart your computer and press the BIOS key. It's often the ESC, F2, F8, F10, F12, or DEL key.
  5. Navigate to your BIOS update settings and add the USB stick as the update source.
  6. Start the update, carefully follow the instructions, and let the PC handle everything while it reboots a few times to apply the update.
    update the bios

Since BIOS updates vary from manufacturer to manufacturer, following the detailed instructions from your motherboard maker is highly advisable. Otherwise, you may end up bricking your computer. There's also a chance that a BIOS update wipes your storage devices.

However, there's nothing to worry about, even if updating the BIOS wipes your data. With the right tool at your side: Wondershare Recoverit, that data can quickly be recovered.

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As a terrific disk encryption tool, BitLocker has evolved since its inception. However, it still suffers from issues. Users often see errors like "BitLocker could not be enabled. C was not encrypted" and similar messages, for which there are two cases.

In case 1, the BitLocker error can be solved by adjusting the BitLocker service, turning it off and back on, or reinstalling TPM drivers. Converting the disk to GPT also works, but it's a solution that can result in data loss.

In case 2, the error can be solved by checking your computer's configuration and ensuring your USB flash drive works correctly. There's also the method of updating the BIOS, a solution that can lead to data loss.

Whether due to BIOS updates or disk conversion, files can be recovered with the help of a reliable data recovery tool like Wondershare Recoverit.

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  • Can I Reinstall BitLocker?
    No, you can't. BitLocker is a built-in Windows tool; the operating system manages it entirely, including its updates and versions. However, although you can't reinstall BitLocker, you can update it and sometimes fix the issue by running Windows Updates.
  • How Can I Check if BitLocker Is Working Normally?
    While most drives encrypted with BitLocker have a small lock icon next to them, you can also check BitLocker's status inside the Control Panel. Navigate to System and Security and select BitLocker Drive Encryption. Here, you'll see BitLocker's status for the operating system drive, fixed data drives, and removable data drives that use BitLocker To Go.
  • What Does It Mean to Enable BitLocker?
    Enabling BitLocker refers to encrypting your disk drives, which may or may not contain sensitive data. The Trusted Platform Module, or TPM for short, works with BitLocker to provide additional security for your system. This collaboration also makes the encryption more complicated, and it's why you sometimes see the error saying, "Bitlocker could not be enabled."
Alex Nappi
Alex Nappi May 14, 24
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