Support for Windows Subsystem for Linux (WSL).

Enhanced Windows Defender Firewall event logs.

Integrated Internet Protocol Security (IPsec), to enforce 'authenticated, end-to-end network communications'.

Reduce the attack surface of a device through rules that restrict or allow traffic using properties such as IP addresses, ports, or program paths.

Windows Defender Firewall: includes several new features.

Bitlocker and Mobile Device Management (MDM) with Azure Active Directory: better protection against accidental password disclore though a 'new key-rolling feature' which 'securely rotates recovery passwords on MDM-managed devices'.

Windows Security app: includes Protection history, including Controlled Folder Access blocks, and Windows Defender Offline Scanning tool actions.

Devices that support version 3, the strongest protection, will be released soon as they require new hardware, according to Microsoft. Microsoft notes that there are three versions of SMM Firmware Protection. Windows Defender 'enables an even higher level of System Management Mode (SMM) Firmware Protection' to detect a higher level of SMM compliance. It is designed to 'reduce the firmware attack surface'.

System Guard: Improved SMM Firmware Protection feature, which is built on top of System Guard Secure Launch.

Microsoft highlights the following core improvements in the new LTSC 2021 version of Windows 10:

Windows 10 Enterprise LTSC 2021 will be supported until 2026 by Microsoft, that is three years less than the support lifecycle of Windows 10 Enterprise LTSC 2019.

The only exception is Windows 10 Enterprise LTSC 2021 IoT, which still gets 10 years of support. Windows 10 Enterprise LTSC 2021 gets 5 years of support, that is 5 years less than the support lifecycle of Windows 10 Enterprise LTSC 2019. One core difference between the two Enterprise versions is that the support lifecycle has been reduced by Microsoft. Windows 10 Enterprise LTSC 2021 includes changes found in the Windows 10 versions 1903, 1909, 2004, 21H1 and 21H2, when compared to Windows 10 Enterprise LTSC 2019.

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