Title Products Classification Last Updated Version Size          Download
2026-01 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5078136) Microsoft Server operating system-21H2 Updates 1/24/2026 n/a 413.6 MB 433696310
2026-01 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5078129) Windows 10 LTSB Updates 1/24/2026 n/a 1266.9 MB 1328407485
2026-01 Cumulative Update Preview for Microsoft server operating system version 21H2 for x64-based Systems (KB5077800) Microsoft Server operating system-21H2 Updates 1/17/2026 n/a 415.0 MB 435179677
2026-01 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5077796) Windows 10 LTSB Updates 1/17/2026 n/a 1061.3 MB 1112895046
2026-01 Dynamic Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5073724) Windows 10 and later GDR-DU Security Updates 1/13/2026 n/a 1072.0 MB 1124060000
2026-01 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5073457) Microsoft Server operating system-21H2 Security Updates 1/13/2026 n/a 413.4 MB 433479078
2026-01 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5073724) Windows 10 LTSB Security Updates 1/13/2026 n/a 1088.3 MB 1141194743
2025-12 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5074976) Windows 10 LTSB Updates 12/18/2025 n/a 1042.9 MB 1093599358
2025-12 Dynamic Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5071546) Windows 10 and later GDR-DU Security Updates 12/9/2025 n/a 1011.4 MB 1060545811
2025-12 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5071547) Microsoft Server operating system-21H2 Security Updates 12/9/2025 n/a 412.1 MB 432136027
2025-12 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5071546) Windows 10 LTSB Security Updates 12/9/2025 n/a 1027.7 MB 1077651265
2025-11 Dynamic Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5068781) Windows 10 and later GDR-DU Security Updates 11/11/2025 n/a 760.1 MB 796970486
2025-11 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5068787) Microsoft Server operating system-21H2 Security Updates 11/11/2025 n/a 412.8 MB 432872715
2025-11 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5068781) Windows 10 LTSB Security Updates 11/11/2025 n/a 776.2 MB 813955638
2025-10 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5070884) Microsoft Server operating system-21H2 Security Updates 10/23/2025 n/a 410.0 MB 429927901
2025-10 Dynamic Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5066791) Windows 10 and later GDR-DU Security Updates 10/14/2025 n/a 713.5 MB 748164657
2025-10 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5066782) Microsoft Server operating system-21H2 Security Updates 10/14/2025 n/a 408.3 MB 428141844
2025-10 Cumulative Update for .NET Framework 3.5 and 4.8 for Microsoft server operating system version 21H2 for x64 (KB5066139) Microsoft Server operating system-21H2 Security Updates 10/14/2025 n/a 72.6 MB 76133287
2025-10 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5066791) Windows 10 LTSB Security Updates 10/14/2025 n/a 729.7 MB 765104062
2025-10 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Microsoft server operating system version 21H2 for x64 (KB5066743) Microsoft Server operating system-21H2 Security Updates 10/14/2025 n/a 145.0 MB 152003191
2025-10 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system version 21H2 for x64 (KB5066134) Microsoft Server operating system-21H2 Security Updates 10/14/2025 n/a 72.4 MB 75869904
2025-10 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 for x64 (KB5066130) Windows 10 LTSB Security Updates 10/14/2025 n/a 75.7 MB 79401999
2025-10 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 10 Version 21H2 for x64 (KB5066746) Windows 10 LTSB Security Updates 10/14/2025 n/a 151.9 MB 159295662
2025-10 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 for x64 (KB5066135) Windows 10 LTSB Security Updates 10/14/2025 n/a 76.2 MB 79893663
2025-09 Dynamic Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5065429) Windows 10 and later GDR-DU Security Updates 9/9/2025 n/a 706.9 MB 741186736
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