Windows Server 2022 Ltsc 21h2 X64 English Decem Updated May 2026

This content is structured for an IT pro, system administrator, or technical documentation use case (e.g., release notes, deployment guide, or catalog entry).

4.1 Method 1: Windows Update (Recommended for Single Servers)

  1. Log in as Administrator.
  2. Open Settings → Windows Update → Advanced Options → ensure “Receive updates for other Microsoft products” is ON (for SQL Server, etc.).
  3. Click Check for updates.
  4. Look for “2024-12 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5048654).”
  5. Click Download and Install. Reboot after installation.

Part 6: Security Impact of the December Update – What Changed?

For security auditors and CISOs, the December 2024 update for Windows Server 2022 LTSC 21H2 introduced four major security posture changes. windows server 2022 ltsc 21h2 x64 english decem updated

6.3. Enhanced Defender for Server with Network Protection

The December update brought the "Network Protection" feature in Block mode for Server 2022, preventing employees on RDSH (Remote Desktop Session Host) from accessing malicious IPs without modifying firewall rules. This content is structured for an IT pro,

Q3: Can I install the December update on Server 2022 Core (no GUI)?

Yes. dism /online /get-packages to list installed updates, then use dism /online /add-package with the MSU. Or simply run usoclient startscan if Windows Update is configured. Log in as Administrator