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Merge pull request #6683 from MicrosoftDocs/hamza/psdk/april2026
Hamza/psdk/april2026
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‎hub/apps/windows-sdk/downloads.md‎

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title: Windows SDK downloads
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description: Downloads for the Windows SDK
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ms.topic: article
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ms.date: 04/10/2026
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ms.date: 04/22/2026
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keywords: windows win32, windows app development, Windows App SDK, windows sdk
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ms.localizationpriority: medium
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---
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| Release | Downloads |
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| ----- | -------------------------------------- |
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| **Windows SDK for Windows 11 (10.0.28000.1839)** <br/> April 2026 <br/> [Release notes](./release-notes.md#build-100280001839) | [Installer](https://go.microsoft.com/fwlink/?linkid=2361309) <br/> [ISO](https://go.microsoft.com/fwlink/?linkid=2361406) |
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| **Windows SDK for Windows 11 (10.0.28000.1721)** <br/> March 2026 <br/> [Release notes](./release-notes.md#build-100280001721) | [Installer](https://go.microsoft.com/fwlink/?linkid=2357925) <br/> [ISO](https://go.microsoft.com/fwlink/?linkid=2357642) |
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| **Windows SDK for Windows 11 26H1 for OEMs and Partners (10.0.28000.1)** <br/> November 2025 | [Installer](//go.microsoft.com/fwlink/?linkid=2342535) <br/> [ISO](//go.microsoft.com/fwlink/?linkid=2343616) |
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## Windows 11 — 26100 versions
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| Release | Downloads |
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| ----- | -------------------------------------- |
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| **Windows SDK for Windows 11 (10.0.26100.8249)** <br/> April 2026 <br/> [Release notes](./release-notes.md#build-100261008249) | [Installer](https://go.microsoft.com/fwlink/?linkid=2361308) <br/> [ISO](https://go.microsoft.com/fwlink/?linkid=2361208) |
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| **Windows SDK for Windows 11 (10.0.26100.8038)** <br/> March 2026 <br/> [Release notes](./release-notes.md#build-100261008038) | [Installer](https://go.microsoft.com/fwlink/?linkid=2358390) <br/> [ISO](https://go.microsoft.com/fwlink/?linkid=2358476) |
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| **Windows SDK for Windows 11 (10.0.26100.7705)** <br/> February 2026 <br/> [Release notes](./release-notes.md#build-100261007705) | [Installer](https://go.microsoft.com/fwlink/?linkid=2349110) <br/> [ISO](https://go.microsoft.com/fwlink/?linkid=2348707) |
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| **Windows SDK for Windows 11 (10.0.26100.7627)** <br/> January 2026 <br/> [Release notes](./release-notes.md#build-100261007627) | [Installer]( https://go.microsoft.com/fwlink/?linkid=2347650) <br/> [ISO](https://go.microsoft.com/fwlink/?linkid=2347553) |

‎hub/apps/windows-sdk/release-notes.md‎

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title: What's new in Windows SDK
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description: Provides information about release notes for the Windows SDK.
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ms.topic: release-notes
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ms.date: 04/10/2026
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ms.date: 04/22/2026
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keywords: windows win32, windows app development, Windows SDK, Windows Platform SDK, windows 11
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ms.localizationpriority: medium
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---
@@ -16,6 +16,150 @@ For the the latest builds, see [Downloads for the Windows SDK](./downloads.md).
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## 28000 versions
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## Build 10.0.28000.1839
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Released: **April, 2026** <br><br>
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<details>
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<summary>WinRT API additions and updates</summary>
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> **Windows.Devices.Haptics** (UniversalApiContract 19.0):
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> <br/>
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> New properties on `KnownSimpleHapticsControllerWaveforms`:
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>
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> - `Collide` — Waveform ID for collision haptic feedback
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> - `Align` — Waveform ID for alignment haptic feedback
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> - `Step` — Waveform ID for step haptic feedback
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> - `Grow` — Waveform ID for growth haptic feedback
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>
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> **Windows.Devices.Printers**:
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> <br/>
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> Graduated from experimental to stable:
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>
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> - `VirtualPrinterInstallationStatus` enum — Installation status values including `InstallationSucceeded`
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> - `VirtualPrinterPreferredInputFormat` enum — Preferred input format values including `OpenXps`
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> - `IVirtualPrinterInstallationParameters` interface
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> - `IVirtualPrinterInstallationResult` interface
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> - `IVirtualPrinterManagerStatics` interface
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> - `IVirtualPrinterSupportedFormat` interface
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> - `IVirtualPrinterSupportedFormatFactory` interface
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> - `VirtualPrinterInstallationParameters` runtime class
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> - `VirtualPrinterInstallationResult` runtime class
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> - `VirtualPrinterSupportedFormat` runtime class
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>
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> **Windows.Media.ClosedCaptioning** (UniversalApiContract 15.0):
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> <br/>
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> New types:
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>
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> - `ClosedCaptionTheme` runtime class — Represents a closed caption theme with customization support
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> - `IClosedCaptionTheme` interface — Properties: `Id`, `DisplayName`, `FontColor`, `ComputedFontColor`, `FontOpacity`, `FontSize`, `FontStyle`, `FontEffect`, `BackgroundColor`, `ComputedBackgroundColor`, `BackgroundOpacity`, `RegionColor`, `ComputedRegionColor`, `RegionOpacity`
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> - `IClosedCaptionThemeStatics` interface — Methods: `GetAvailableThemes`, `GetSelectedTheme`, `TrySetSelectedTheme`; Events: `ThemesChanged`, `SelectedThemeChanged`
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</details>
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<details>
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<summary>WinRT Experimental API additions</summary>
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> **Windows.Storage.Search** (UniversalApiContract 19.0):
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> <br/>
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> New interface:
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>
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> - `IQueryOptionsAdditionalSearchSources` — Adds `IncludeCloudProviders` and `IncludeLocalSemanticIndex` properties to `QueryOptions`
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</details>
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<details>
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<summary>Win32 API additions and updates</summary>
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> **Bluetooth Hands-Free Profile (bthdef.h)**
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> <br/>
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> Added comprehensive Bluetooth Hands-Free Profile (HFP) feature constants:
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>
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> - `HFP_AG_SDP_SUPPORTED_FEATURE_*` — Audio Gateway SDP supported feature flags for three-way calling, echo cancellation, voice recognition, in-band ring tone, voice tag, wide-band speech, and more
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> - `HFP_AG_BRSF_SUPPORTED_FEATURE_*` — Audio Gateway BRSF supported feature flags for three-way calling, echo cancellation, voice recognition, codec negotiation, and more
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> - `HFP_HF_SDP_SUPPORTED_FEATURE_*` — Hands-Free SDP supported feature flags for echo cancellation, three-way calling, CLI presentation, voice recognition, and more
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> - `HFP_HF_BRSF_SUPPORTED_FEATURE_*` — Hands-Free BRSF supported feature flags for echo cancellation, three-way calling, voice recognition, codec negotiation, and more
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> - `HFP_NETWORK_NO_ABILITY_TO_REJECT`, `HFP_NETWORK_ABILITY_TO_REJECT` — Network call rejection capability flags
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>
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> **HID Usages (hidusage.h)**
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> <br/>
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> New haptics usage values:
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>
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> - `HID_USAGE_HAPTICS_WAVEFORM_COLLIDE`, `HID_USAGE_HAPTICS_WAVEFORM_ALIGN`, `HID_USAGE_HAPTICS_WAVEFORM_STEP`, `HID_USAGE_HAPTICS_WAVEFORM_GROW`
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>
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> **NVMe (nvme.h)**
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> <br/>
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> Fixed typo:
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>
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> - `NVME_LOG_PAGE_BOOT_PARTITON` renamed to `NVME_LOG_PAGE_BOOT_PARTITION`
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>
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> **Security / SSPI (sspi.h)**
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> <br/>
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> New GUID:
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>
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> - `SEC_WINNT_AUTH_DATA_TYPE_PLACEHOLDER` — Placeholder authentication data type
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>
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> **Security / LSA (ntlsa.h)**
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> <br/>
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> New agent-based authentication APIs:
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>
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> - `LsaCreateAgentAccount` — Creates an agent account
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> - `LsaRetrieveAgentLogonCredential` — Retrieves agent logon credentials
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> - `LsaEnumerateAgentAccounts` — Enumerates agent accounts
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> - `LsaDeleteAgentAccount` — Deletes an agent account
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> - `LsaGetAgentOwner` — Gets the agent owner
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> - `LSA_AGENT_LOGON_CREDENTIAL` — Agent logon credential struct
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> - `LSA_AGENT_ACCOUNT_INFO` — Agent account information struct
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> - `LSA_AGENT_ACCOUNT_LIST` — List of agent accounts struct
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>
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> **Security / Authentication (NTSecPKG.h)**
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> <br/>
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> New definitions:
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>
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> - `KSecAllocateContextBuffer` — Function for allocating security context buffers
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> - Added `extern "C"` guards for C++ compatibility
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>
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> **Content Indexing (NTQuery.h)**
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> <br/>
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> New define:
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>
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> - `CI_VERSION_CORRID` — Content index correlation ID version constant
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>
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> **Text Services (TextStor.h)**
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> <br/>
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> New defines:
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>
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> - `TS_SD_DISABLEWRITINGSUGGESTIONS` — Flag to disable writing suggestions
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> - `TS_SS_MULTILINE` — Flag for multiline text store support
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>
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> **WRL Async (wrl/async.h)**
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> <br/>
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> Updated:
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>
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> - Async completion handling reworked for thread safety using `_InterlockedCompareExchange` and reference counting (`cCompleteDelegateRefCount_`)
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</details>
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<details>
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<summary>COM API updates</summary>
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> **Edition Upgrade Helper (EditionUpgradeHelper.idl)**
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> <br/>
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> Updated method:
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>
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> - `IClipServiceNotificationHelper::ShowToast` — Parameter list simplified from 5 BSTR parameters to `void`
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>
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> **Text Services Framework (TextStor.idl)**
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> <br/>
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> New constants:
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>
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> - `TS_SD_DISABLEWRITINGSUGGESTIONS` — Flag to disable writing suggestions
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> - `TS_SS_MULTILINE` — Flag for multiline text store support
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</details>
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---
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## Build 10.0.28000.1721
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Released: **March, 2026** <br><br>
@@ -157,6 +301,166 @@ This is a major version bump to the **28000** SDK series.
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## 26100 versions
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## Build 10.0.26100.8249
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Released: **April, 2026** <br><br>
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<details>
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<summary>WinRT API additions and updates</summary>
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> **Windows.Devices.Printers**:
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> <br/>
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> Updated methods:
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>
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> - `IIppAttributeConverterStatics.ConvertPrintTicketToIppAttributesForPrinter` — Now accepts an additional `targetPdlFormat` parameter
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>
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> Graduated from experimental to stable:
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>
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> - `IppAttributeConverter` runtime class
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> - `IppAttributeGroupKind` enum
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> - `IPdlPassthroughProvider2` interface
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>
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> **Windows.Graphics.Printing.PrintSupport**:
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> <br/>
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> Graduated from experimental to stable:
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>
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> - `IPrintSupportPrintDeviceCapabilitiesChangedEventArgs5` — Interface with `SetPdlPassthroughWithJobAttributesSupported` method
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>
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> New types:
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>
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> - `PrintSupportEnterpriseManagementUIEventArgs` — Implements `IActivatedEventArgs` and `IActivatedEventArgsWithUser` for enterprise management UI activation scenarios
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>
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> **Windows.Graphics.Printing.Workflow**:
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> <br/>
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> Graduated from experimental to stable:
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>
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> - `IPrintWorkflowPrinterJob3` — Interface with passthrough attribute support
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>
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> Updated properties:
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>
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> - `IsPassthroughJob` renamed to `IsPassthroughJobWithAttributes`
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</details>
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<details>
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<summary>WinRT Experimental API additions</summary>
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> **Windows.AI.Agents.Mcp**:
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> <br/>
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> New interface:
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>
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> - `IMcpMessageFilterExperimental2` — Adds `Initialize` method with client/server process identifiers and IDs, plus `OnMessage` for MCP message filtering
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>
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> **Windows.Devices.Haptics**:
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> <br/>
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> New properties on `KnownSimpleHapticsControllerWaveforms`:
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>
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> - `Collide` — Waveform ID for collision haptic feedback
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> - `Align` — Waveform ID for alignment haptic feedback
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> - `Step` — Waveform ID for step haptic feedback
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> - `Grow` — Waveform ID for growth haptic feedback
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>
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> **Windows.Graphics.Capture**:
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> <br/>
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> New interfaces:
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>
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> - `IDirect3D11CaptureFrame3` — Adds `ConfigurationIteration` property to capture frames
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> - `IGraphicsCaptureSession7` — Adds `ConfigurationIteration` property and window exclusion list management
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> - `IDisplayGraphicsCaptureSession` — Display-specific graphics capture session
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>
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> New methods:
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>
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> - `SetWindowExclusionList` — Sets a list of windows to exclude from capture
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> - `GetWindowExclusionList` — Gets the current window exclusion list
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>
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> **Windows.Media.ClosedCaptioning**:
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> <br/>
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> New types:
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>
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> - `ClosedCaptionTheme` — Represents a closed caption theme with customization support
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>
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> New methods:
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>
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> - `GetAvailableThemes` — Retrieves available closed caption themes
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> - `GetSelectedTheme` — Gets the currently selected theme
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> - `TrySetSelectedTheme` — Attempts to set the selected theme
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>
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> New events:
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>
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> - `SelectedThemeChanged` — Fires when the selected closed caption theme changes
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</details>
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<details>
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<summary>Win32 API additions and updates</summary>
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> **Event Tracing (evntprov.h / evntcons.h)**
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> <br/>
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> New definitions:
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>
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> - `EVENT_DATA_DESCRIPTOR_TYPE_RESERVED1` — Reserved event data descriptor type
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> - `EventProviderSetReserved2` — New value in `EVENT_INFO_CLASS` enum
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> - `EVENT_HEADER_FLAG_RESERVED1` — New event header flag
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>
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> **HID Usages (hidusage.h)**
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> <br/>
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> New haptics usage values:
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>
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> - `HID_USAGE_HAPTICS_WAVEFORM_COLLIDE` — Collision haptic waveform
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> - `HID_USAGE_HAPTICS_WAVEFORM_ALIGN` — Alignment haptic waveform
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> - `HID_USAGE_HAPTICS_WAVEFORM_STEP` — Step haptic waveform
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> - `HID_USAGE_HAPTICS_WAVEFORM_GROW` — Growth haptic waveform
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>
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> **Error Codes (winerror.h)**
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> <br/>
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> New BitLocker error codes:
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>
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> - `FVE_E_MISSING_PROTECTORS` — BitLocker protectors are missing
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> - `FVE_E_METHOD_MISMATCH` — BitLocker method mismatch
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>
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> **Security / Authentication (NTSecPKG.h)**
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> <br/>
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> New definitions:
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>
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> - `SECPKG_CALL_AGENT_LOGON` — Security package call flag for agent-based logon
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> - `KSecAllocateContextBuffer` — Function for allocating security context buffers
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> - Added `extern "C"` guards for C++ compatibility
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>
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> **Crypto / TPM (ncrypt.h)**
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> <br/>
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> New TPM property defines:
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>
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> - `NCRYPT_PCP_AIKSTORE_PROPERTY` — TPM AIK store property
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> - `NCRYPT_PCP_EKSTORE_PROPERTY` — TPM EK store property
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>
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> **Content Indexing (NTQuery.h)**
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> <br/>
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> New define:
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>
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> - `CI_VERSION_QUERY_METADATA` — Content index version for query metadata / semantic reliability
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>
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> **Shell API (shellapi.h)**
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> <br/>
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> New define:
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>
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> - `ABC_OVERLAYDESKTOPICONS` — Overlay desktop icons flag for `ABM_NEW`
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>
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> **Rust Bindgen Compatibility (ntdef.h / winnt.h)**
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> <br/>
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> Updated:
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>
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> - `DECLSPEC_NOINITALL` macro now excludes Rust bindgen passes via `!defined(RUST_BINDGEN)`
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>
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> **WRL Async (wrl/async.h)**
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> <br/>
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> Updated:
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>
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> - Async completion handling reworked for thread safety using `_InterlockedCompareExchange` and reference counting (`cCompleteDelegateRefCount_`)
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</details>
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---
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## Build 10.0.26100.8038
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Released: **March, 2026** <br><br>

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