While this is a most welcome software offered by Microsoft for privacy purposes, the tool has its glitches. For instance, users complained about protected drives that were unusable when migrating from an older OS version to a newer one. Other common BitLocker reported error messages are:

This device can’t use a Trust Platform Module Illegal operation attempted on a registry key that has been marked for deletion BitLocker Drive Encryption cannot be used because critical BitLocker files are missing or corrupted; use Windows Startup Repair to restore the file to your computer (0x8031004A) The BitLocker encryption key could not be obtained from the Trusted Platform Module (TPM) and enhanced PIN; try using a PIN containing only numerals. C: was not encrypted BitLocker could not be enabled; the data drive is not set to automatically unlock on the current computer and cannot be unlocked automatically. C: was not encrypted The drive cannot be encrypted because it contains system boot information

For each of these errors, you’ll find a solution in this article. Hopefully, by the end of this material, you’ll be able to use BitLocker to the best of your needs.

How can I fix BitLocker drive encryption issues?

1. Clean the disk and re-create the partition

1.1 Clear the partition with a third-party software Before we continue, keep in mind that this method will erase all the information stored on your disk. It’s advisable to create a backup on a different drive just to make sure that you won’t lose all your files and folders. For less hassle, you could assign this task to a third-party dedicated tool that will surely do the right thing. On this note, we recommend the excellent tool below. It is a multifunctional assistant, that will manage, partition, and optimize your hard drive according to your needs. If you have a backup, as mentioned, run this software to split, move, resize and manage your partitions, without data loss, to make the most of your disk space. In this case, you’ll want to use the Format Partition feature, to fresh-clean the disk, so that you can move the saved data back in the blank space. ⇒ Get AOMEI Partition Assistant 1.2 Clear the partition manually SPONSORED The manual process can be tricky so proceed with extreme care and follow it to the letter. If you’re not experienced, you should go with the software recommended above.

2. Change the Security Chip settings

According to reports, it seems this issue affects machines equipped with Intel PTT Security Chips using particular settings. Namely, when the issue occurred, the BitLocker Drive Encryption used TPM and PIN, and the Allow BitLocker without a compatible TPM option was turned off. Also, the machines were running the OS in BIOS, not UEFI. We listed the general steps to follow above. Keep in mind that they may vary on your machine. If you want to reverse the action, you need to replace the firmware’s boot capability with UEFI boot. Sometimes, you may also need to reinstall the OS. In case you cannot arrive at a fix, we strongly recommend you to switch to using the software below, which is a powerful encryption tool. Its wide range of security features includes copying encrypted lockers to the USB drive, CDs, DVDs, and even email attachments, as well as the possibility to upload your encrypted files to a cloud server. ⇒ Get Folder Lock

3. Enable BitLocker without a compatible TPM

Enabling BitLocker from the Group Policy Editor without TPE can solve this problem quickly so make sure you try it by using the steps above.

4. Clear the TPM (Trusted Platform Module)

<!– wp:windowsreport-companion/editorial-note-block {“text”:”Note: Before starting to clear TPM settings, please make sure that you backed up your computer, as mentioned in the first solution. This method may result in data loss.”,”icon”:”//cdn.windowsreport.com/wp-content/themes/windowsreport/assets/images/svg/note-pencil.svg”} /–>

5. Change the settings of USB devices in BIOS

This solution applies when BitLocker fails to encrypt the operating system drive using a USB startup key. The cause of it can be related to some settings in BIOS mode. BitLocker usually does a great job encrypting your data, but after that, don’t forget to safeguard them with one of the best automatic backup software for Windows 10. We hope that these solutions helped you to fix your BitLocker encryption problems. If you’ve got additional tips and suggestions, feel free to list them in the comments section below.

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