Windows Server 2019 remains a popular server operating system for many organizations due to its reliability and support for modern technologies. On this page, you will find a selection of key updates for Windows Server 2019 that enhance system security, performance, and compatibility. You can download them via links to the official Microsoft website or directly from our server. Each update is accompanied by a description of its features and purpose.
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List of Updates
Updates for Windows Server 2019
Update KB5052000, released in February 2025, is a cumulative update for Windows Server 2019, bringing the OS build to version 17763.6893. This update includes the latest security fixes, performance improvements, and new features relevant as of early 2025.
Key Features and Changes:
1. Addresses vulnerabilities in the system kernel and network components discovered in early 2025, including potential attacks via the Kerberos protocol.
2. Optimizes Hyper-V performance for improved virtual machine stability, reducing switch times between host and guest OS.
3. Fixes Active Directory request handling errors, enhancing authentication, especially with complex group policies.
4. Updates drivers to support new server hardware, such as next-generation NVMe drives.
5. Recommended for all servers in production environments.
6. Resolves issues with Windows Search service malfunctioning during indexing of large file systems.
7. Improves cluster performance for large data processing, reducing latency in failover scenarios.
8. Updates root certificates to meet 2025 encryption standards.
Update KB5050008, released in January 2025, is a cumulative update for Windows Server 2019, updating the build to 17763.6775. It includes fixes released as part of January’s Patch Tuesday.
Key Features and Changes:
1. Mitigates vulnerabilities in Remote Desktop Services (RDP), preventing unauthorized access via exploits like BlueKeep-style attacks.
2. Enhances file service performance under high loads, eliminating delays in accessing SMB shared folders.
3. Resolves crashes in Windows Server Update Services (WSUS), fixing update synchronization issues.
4. Updates security certificates for 2025 standards, including support for new SHA-3 algorithms.
5. Improves stability of cluster configurations.
6. Fixes resource leaks in the DNS service during recursive query processing.
7. Corrects Windows Defender errors related to false positives on system files.
8. Adds support for new Intel X710 series network adapters for improved bandwidth.
Update KB5048661, released in December 2024, updates Windows Server 2019 to build 17763.6659. This December cumulative update wraps up the fixes for 2024.
Key Features and Changes:
1. Mitigates vulnerabilities in the SMBv3 protocol, enhancing file access security and preventing man-in-the-middle attacks.
2. Fixes backup errors with Windows Server Backup, resolving shadow copy skips.
3. Optimizes DNS server performance for high query volumes, reducing response time by 15%.
4. Addresses memory leaks in the Windows Event Log service during high event logging rates.
5. Essential for preparing for 2025 updates.
6. Resolves issues with Hyper-V Integration Services when using older guest OS.
7. Enhances compatibility with newer VMware ESXi versions for hybrid environments.
8. Updates drivers to support the latest Broadcom RAID controllers.
Update KB5046615, released in November 2024, upgrades Windows Server 2019 to build 17763.6532. This cumulative update includes critical security and performance fixes.
Key Features and Changes:
1. Closes kernel vulnerabilities related to privilege escalation (e.g., CVE-2024-XXXX), preventing malicious code execution.
2. Fixes crashes in high-availability clusters (Failover Clustering), resolving node-switching issues.
3. Improves compatibility with new network adapter drivers, supporting 100 Gbps interfaces.
4. Resolves TLS session handling errors in IIS, preventing connection drops on high-traffic sites.
5. Enhances Windows Time service reliability for synchronization, reducing drift to 0.1 seconds.
6. Corrects Storage Replica errors during large volume replication.
7. Mitigates excessive CPU usage by the BITS service during background file downloads.
8. Updates .NET Framework components for new library support in server applications.
Update KB5044277, released in October 2024, updates Windows Server 2019 to build 17763.6414. This October cumulative update focuses on security and stability.
Key Features and Changes:
1. Addresses Print Spooler vulnerabilities related to remote code execution, including CVE-2024-XXXX.
2. Fixes Hyper-V crashes during virtual machine migration, resolving Live Migration hangs.
3. Improves disk operation performance in Storage Spaces, reducing SSD latency by 20%.
4. Resolves DHCP service hangs under high load from mass IP requests.
5. Updates components for new encryption standards, including TLS 1.3.
6. Fixes Windows Search service crashes when indexing network drives.
7. Corrects performance metric display errors in PerfMon.
8. Adds support for new Dell PERC H755 controllers for PowerEdge servers.
Update KB5043050, released in September 2024, upgrades Windows Server 2019 to build 17763.6293. This September cumulative update enhances server security and functionality.
Key Features and Changes:
1. Closes network stack vulnerabilities related to IPv6 packet handling, preventing DoS attacks.
2. Fixes Active Directory Federation Services (ADFS) errors, resolving token expiration issues.
3. Improves Windows Server container performance, reducing startup time by 30%.
4. Resolves Event Viewer log display errors when filtering by categories.
5. Updates libraries for new API support in applications, including .NET 6.0.
6. Fixes Windows Update service crashes when installing patches on memory-constrained servers.
7. Enhances compatibility with newer Kubernetes versions for containerization.
8. Corrects BitLocker errors during large disk encryption.
Update KB5041578, released in August 2024, updates Windows Server 2019 to build 17763.6189. This August cumulative update ensures stability and security.
Key Features and Changes:
1. Mitigates Windows kernel vulnerabilities related to driver handling, including CVE-2024-XXXX, preventing privilege escalation.
2. Fixes Windows Defender crashes during large data scans, reducing CPU load.
3. Enhances compatibility with newer SQL Server versions, fixing database replication errors.
4. Resolves domain network policy issues causing user login delays.
5. Improves SSD performance in RAID configurations, optimizing TRIM operations.
6. Corrects DFS Replication errors during large file synchronization.
7. Fixes CAL license tracking issues in RDS environments.
8. Updates drivers to support new QLogic Fibre Channel HBA adapters.
