The system will check whether your PC meets the system requirements for using BitLocker.Click the Turn on BitLocker link to the right of your operating system drive.Open the Control Panel in Large icons view, and then click BitLocker Drive Encryption.How to Enable BitLocker on Windows 10 Operating System Drive When TPM is not available, you have to use group policy to enable additional authentication at startup. Before getting started, you need to find out if your computer has a TPM chip installed. Note: BitLocker is only available in the Pro, Enterprise and Education editions of Windows 10. In this tutorial we’ll walk you through the steps to turn on BitLocker drive encryption on Windows 10 OS drive. In order to prevent most offline physical attacks and firmware-level malware, you can encrypt the operating system drive with BitLocker. BitLocker offers the easiest and most secure way to encrypt your partition or hard drive in Windows.