Title Products Classification Last Updated Version Size          Download
2026-04 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5091575) Microsoft Server operating system-21H2 Updates 4/19/2026 n/a 516.2 MB 541269806
2026-04 Dynamic Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5082200) Windows 10 and later GDR-DU Security Updates 4/14/2026 n/a 842.5 MB 883422156
2026-04 Cumulative Update for .NET Framework 3.5 and 4.8 for Microsoft server operating system version 21H2 for x64 (KB5082427) Microsoft Server operating system-21H2 Security Updates 4/14/2026 n/a 74.6 MB 78230710
2026-04 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system version 21H2 for x64 (KB5082425) Microsoft Server operating system-21H2 Security Updates 4/14/2026 n/a 74.5 MB 78129614
2026-04 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Microsoft server operating system version 21H2 for x64 (KB5084071) Microsoft Server operating system-21H2 Security Updates 4/14/2026 n/a 149.1 MB 156360324
2026-04 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5082142) Microsoft Server operating system-21H2 Security Updates 4/14/2026 n/a 515.8 MB 540859310
2026-04 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 for x64 (KB5082419) Windows 10 LTSB Security Updates 4/14/2026 n/a 75.8 MB 79518963
2026-04 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 10 Version 21H2 for x64 (KB5084067) Windows 10 LTSB Security Updates 4/14/2026 n/a 152.0 MB 159363527
2026-04 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 for x64 (KB5082426) Windows 10 LTSB Security Updates 4/14/2026 n/a 76.1 MB 79844564
2026-04 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5082200) Windows 10 LTSB Security Updates 4/14/2026 n/a 858.8 MB 900487710
2026-03 Dynamic Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5078885) Windows 10 and later GDR-DU Security Updates 3/10/2026 n/a 829.9 MB 870165779
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
2026-03 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5078885) Windows 10 LTSB Security Updates 3/10/2026 n/a 846.1 MB 887209056
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 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5075912) Windows 10 and later GDR-DU Security Updates 2/10/2026 n/a 822.7 MB 862699282
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
2026-02 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5075912) Windows 10 LTSB Security Updates 2/10/2026 n/a 839.0 MB 879718321
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
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