Title Products Classification Last Updated Version Size          Download
2026-03 Dynamic Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5079518) Windows 10 and later Dynamic Update Critical Updates 3/10/2026 n/a 17.3 MB 18106103
2026-03 Dynamic Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5078822) Windows 10 and later Dynamic Update, Windows Safe OS Dynamic Update Critical Updates 3/10/2026 n/a 28.2 MB 29600472
2026-03 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5078766) Microsoft Server operating system-21H2 Security Updates 3/10/2026 n/a 499.4 MB 523660670
2026-02 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5082314) Microsoft Server operating system-21H2 Updates 3/2/2026 n/a 413.0 MB 433051920
2026-02 Dynamic Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5075915) Windows 10 and later Dynamic Update, Windows Safe OS Dynamic Update Critical Updates 2/10/2026 n/a 22.7 MB 23778675
2026-02 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5075906) Microsoft Server operating system-21H2 Security Updates 2/10/2026 n/a 412.4 MB 432394998
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 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 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
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
2025-11 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
2025-10 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 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 .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
2025-09 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5065432) Microsoft Server operating system-21H2 Security Updates 9/9/2025 n/a 402.8 MB 422411416
2025-09 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Microsoft server operating system version 21H2 for x64 (KB5065962) Microsoft Server operating system-21H2 Updates 9/9/2025 n/a 145.0 MB 152008130
2025-09 Cumulative Update for .NET Framework 3.5 and 4.8 for Microsoft server operating system version 21H2 for x64 (KB5065748) Microsoft Server operating system-21H2 Updates 9/9/2025 n/a 72.6 MB 76138612
2025-09 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system version 21H2 for x64 (KB5065753) Microsoft Server operating system-21H2 Updates 9/9/2025 n/a 72.4 MB 75869518
2025-08 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5063880) Microsoft Server operating system-21H2 Security Updates 8/12/2025 n/a 402.0 MB 421493495
2025-07 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5062572) Microsoft Server operating system-21H2 Security Updates 7/8/2025 n/a 399.5 MB 418934396
2025-07 Cumulative Update for .NET Framework 3.5 and 4.8 for Microsoft server operating system version 21H2 for x64 (KB5062063) Microsoft Server operating system-21H2 Updates 7/8/2025 n/a 72.5 MB 76025527
2025-07 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system version 21H2 for x64 (KB5062061) Microsoft Server operating system-21H2 Updates 7/8/2025 n/a 72.4 MB 75871289
2025-07 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Microsoft server operating system version 21H2 for x64 (KB5062159) Microsoft Server operating system-21H2 Updates 7/8/2025 n/a 144.9 MB 151896816
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