Microsoft has rolled out a major upgrade to BitLocker, its built-in drive encryption tool for Windows, promising faster performance and better efficiency for users. The new feature, called hardware-accelerated BitLocker, is being introduced with the latest Windows 11 updates and is designed to make encryption less demanding on the system.
Traditionally, BitLocker relied mainly on the computer’s central processing unit (CPU) to encrypt and decrypt data stored on a device. While secure, this software-based approach could slow down performance, especially on laptops or systems handling large amounts of data. With the new update, Microsoft is shifting much of this work to specialised cryptographic hardware built directly into modern processors.
By using dedicated hardware for encryption, Windows can now secure data more quickly and with far less strain on the CPU. According to Microsoft, this change can deliver significantly faster read and write speeds on encrypted drives, bringing performance closer to that of unencrypted storage. It also reduces overall power consumption, which can help improve battery life on portable devices.
The hardware-accelerated BitLocker feature will automatically turn on for devices that meet the required hardware standards. These include newer processors and system-on-chips (SoCs) that support built-in encryption engines. Systems without compatible hardware will continue using the existing software-based BitLocker, ensuring no loss of functionality or security.
Security remains a key focus of the update. By handling encryption keys at the hardware level, the new approach adds an extra layer of protection. This reduces the risk of certain attacks that target encryption keys stored in system memory, complementing existing safeguards such as the Trusted Platform Module (TPM).
The rollout has begun with Windows 11 Insider Preview builds, including upcoming versions like 24H2 and 25H2. Microsoft is expected to make the feature more widely available as part of future stable releases, with support gradually expanding across more devices and hardware platforms.
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