January 12, 2021 - KB4598242 (OS Builds 19041.746 and 19042.746)
Highlights
- Updates to improve security when using external devices, such as game controllers, printers, and web cameras.
- Updates to improve security when Windows performs basic operations.
Improvements and fixes
This non-security update includes quality improvements. Key changes include:
- Addresses a security vulnerability issue with HTTPS-based intranet servers. After installing this update, HTTPS-based intranet servers cannot, by default, use a user proxy to detect updates. Scans using these servers will fail if you have not configured a system proxy on the clients. If you must use a user proxy, you must configure the behavior using the policy "Allow user proxy to be used as a fallback if detection using system proxy fails." To ensure the highest levels of security, also use Windows Server Update Services (WSUS) Transport Layer Security (TLS) certificate pinning on all devices. This change does not affect customers who are using HTTP WSUS servers. For more information, see Changes to scans, improved security for Windows devices.
- Addresses a security bypass vulnerability that exists in the way the Printer Remote Procedure Call (RPC) binding handles authentication for the remote Winspool interface. For more information, see KB4599464.
- Security updates to Windows App Platform and Frameworks, Windows Media, Windows Fundamentals, Windows Kernel, Windows Cryptography, Windows Virtualization, Windows Peripherals, and Windows Hybrid Storage Services.


Windows Server, version 2004is a Semi-Annual Channel (SAC) Release. In our most recent Windows Server SAC releases, we've optimized for containers. In this release, we continued improving fundamentals for the core container platform such as performance and reliability. We've also worked with .NET team and PowerShell team and further optimized image size and performance for Server Core containers. We will share more details below. On container networking side, we implemented several improvements to allow for better scalability, robustness, and reliability. One example is additional changes and improvements to Direct Server Return (DSR).
Windows Server, version 20H2 is the next Semi-Annual Channel release of Windows Server, version 2004. This version focuses on reliability, performance, and other general improvements, but has no new features. Like other Semi-Annual Channel releases, it's supported for 18 months after its release.
Microsoft Corporation,leading developer of personal-computer software systems and applications. The company also publishes books and multimedia titles, offers e-mail services, and sells electronic game systems, computer peripherals (input/output devices), and portable media players. It has sales offices throughout the world.
Product:Windows Server
Version:20H2 SAC 19042.746.vb_release_svc_prod1.210106-2232 MSDN
Supported Architectures:x64
Website Home Page :www. microsoft.com
Language:english
System Requirements:PC *
Size:3.9 Gb

Minimum:
- Processor: 1 gigahertz (GHz) or faster processor or SoC
- RAM: 2 gigabyte (GB) for 64-bit
- Hard disk space: 32 GB for 64-bit OS
- Graphics card: DirectX 9 or later with WDDM 1.0 driver
- Display: 800 x 600, a minimum diagonal display size for the primary display of 7-inches or larger.