Microsoft Orca Version 10.1.28000.2114
Build 10.0.28000.2114$$$Released: May; 2026$$$WinRT API additions and updates$$$Windows.Devices.Printers:$$$Graduated from experimental to stable:$$$IppAttributeConverter.ConvertPrintTicketToIppAttributesForPrinter(String; WorkflowPrintTicket; String) — Print ticket to IPP attribute conversion$$$Windows.Graphics.Printing.Workflow:$$$Graduated from experimental to stable:$$$PrintWorkflowPrinterJob.IsPassthroughJobWithAttributes — Property indicating whether a print job is a passthrough job (renamed from IsPassthroughJob)$$$$$$Win32 API additions and updates$$$Direct3D Kernel Mode (d3dkmthk.h)$$$New:$$$_D3DKMT_QUERYFEATUREINTERFACE — Query feature interface structure$$$Status Codes (ntstatus.h)$$$New:$$$STATUS_SMB_ALTERNATIVE_PORT_CONFLICT — SMB alternative port conflict status code$$$Power (poclass.h)$$$New:$$$BATTERY_TEST_EXEMPT — Battery test exemption flag$$$Error Codes (winerror.h)$$$New:$$$FVE_E_METHOD_MISMATCH — Full Volume Encryption method mismatch error$$$ERROR_SMB_ALTERNATIVE_PORT_CONFLICT — SMB alternative port conflict error$$$TPM / Key Storage (ncrypt.h)$$$New:$$$NCRYPT_PCP_SDDIDK_OPERATION — Platform Crypto Provider SDDI DK operation$$$NCRYPT_PCP_AIKSTORE_PROPERTY — AIK store property$$$NCRYPT_PCP_EKSTORE_PROPERTY — EK store property$$$NCRYPT_PCP_SDDIDK_CONTEXT_PROPERTY — SDDI DK context property$$$Content Index (NTQuery.h)$$$New:$$$CI_VERSION_QUERY_METADATA — Content index version query metadata$$$Security Packages (NTSecPKG.h)$$$New:$$$SECPKG_CALL_AGENT_LOGON — Security package agent logon call flag$$$Shell (shellapi.h)$$$New:$$$ABC_OVERLAYDESKTOPICONS — Overlay desktop icons flag$$$Windows Filtering Platform (fwpmtypes.h / fwpvi.h)$$$Removed:$$$FWPM_LAYER_STATISTICS0_; FWPM_STATISTICS0_ — Filtering platform statistics structures$$$FWPM_LAYER_STATISTICS; FWPM_STATISTICS — Filtering platform statistics defines$$$Terminal Services Virtual Channels (tsvirtualchannels.h)$$$Removed:$$$IWTSRemoteAppWindowInfoService — Remote app window info service interface and related definitions$$$$$$COM API updates$$$Windows Filtering Platform (fwpmtypes.idl)$$$Removed:$$$FWPM_LAYER_STATISTICS0_; FWPM_STATISTICS0_ — Filtering platform statistics structures$$$Terminal Services Virtual Channels (tsvirtualchannels.idl)$$$Removed:$$$IWTSRemoteAppWindowInfoService — Remote app window info service interface$$$GetLocalHwnd — Get local window handle function
Microsoft Orca Version 10.1.28000.1839
28000 versions$$$Build 10.0.28000.1839$$$Released: April; 2026$$$$$$$$$WinRT API additions and updates$$$WinRT Experimental API additions$$$Win32 API additions and updates$$$COM API updates
Microsoft Orca Version 10.1.28000.1839
28000 versions$$$Build 10.0.28000.1839$$$Released: April; 2026$$$$$$$$$WinRT API additions and updates$$$WinRT Experimental API additions$$$Win32 API additions and updates$$$COM API updates
Microsoft Orca Version 10.1.28000.1721
Build 10.0.28000.1721$$$Released: March; 2026$$$$$$$$$This is a major version bump to the 28000 SDK series.$$$$$$WinRT API additions and updates$$$WinRT Experimental API additions (UniversalApiContract 20.0)$$$Win32 API additions and updates$$$COM API updates$$$
Microsoft Orca Version 10.1.28000.1721
Build 10.0.28000.1721$$$Released: March; 2026$$$$$$$$$This is a major version bump to the 28000 SDK series.$$$$$$WinRT API additions and updates$$$WinRT Experimental API additions (UniversalApiContract 20.0)$$$Win32 API additions and updates$$$COM API updates$$$
Microsoft Orca Version 10.1.28000.1721
Build 10.0.28000.1721$$$Released: March; 2026$$$$$$$$$This is a major version bump to the 28000 SDK series.$$$$$$WinRT API additions and updates$$$WinRT Experimental API additions (UniversalApiContract 20.0)$$$Win32 API additions and updates$$$COM API updates$$$
Microsoft Orca Version 10.1.26100.7705
Build 10.0.26100.7705$$$Released: February; 2026$$$$$$$$$WinRT API additions and updates$$$Win32 API additions and updates$$$The following issue is fixed in this SDK version: BinSkim Warning 4146 Triggered by Windows SDK 10.0.26100.7175 in Visual Studio$$$$$$
Microsoft Orca Version 10.1.26100.7705
Build 10.0.26100.7705$$$Released: February; 2026$$$$$$$$$WinRT API additions and updates$$$Win32 API additions and updates$$$The following issue is fixed in this SDK version: BinSkim Warning 4146 Triggered by Windows SDK 10.0.26100.7175 in Visual Studio$$$$$$
Microsoft Orca Version 10.1.26100.7463
$$$Build 10.0.26100.7463$$$Released: December; 2025$$$$$$WinRT API additions and updates$$$Win32 API additions and updates
Microsoft Orca Version 10.1.26100.7463
$$$Build 10.0.26100.7463$$$Released: December; 2025$$$$$$WinRT API additions and updates$$$Win32 API additions and updates
Microsoft Orca Version 10.1.26100.7175
Windows 11; Build 10.0.26100.7175 (released 11/2025)$$$Updates made to the following Win32 API headers (defines; structs; enums; interfaces and other changes):$$$$$$AppxPackaging.h; AppxPackaging.idl (interfaces IAppxFactory4; IAppxBundleFactory3; IAppxBundleReader2)$$$WinRT namespaces updated (new or modified APIs/types):$$$$$$Windows.ApplicationModel.DataTransfer$$$Windows.Management.Update$$$Windows.Security.Credentials$$$Windows.Storage.Provider$$$Windows.System.RemoteSystems$$$AppxManifestTypes.xsd schema updated
Microsoft Orca Version 10.1.26100.7175
Windows 11; Build 10.0.26100.7175 (released 11/2025)$$$Updates made to the following Win32 API headers (defines; structs; enums; interfaces and other changes):$$$$$$AppxPackaging.h; AppxPackaging.idl (interfaces IAppxFactory4; IAppxBundleFactory3; IAppxBundleReader2)$$$WinRT namespaces updated (new or modified APIs/types):$$$$$$Windows.ApplicationModel.DataTransfer$$$Windows.Management.Update$$$Windows.Security.Credentials$$$Windows.Storage.Provider$$$Windows.System.RemoteSystems$$$AppxManifestTypes.xsd schema updated
Microsoft Orca Version 10.1.26100.6901
Windows 11; Build 10.0.26100.6901 (released 10/2025)$$$Updates made to the following Win32 API headers; defines; structs; enums; and other changes:$$$$$$networksetup.h$$$windows.system.power.thermal.h$$$windows.ui.input.preview.text.h$$$Added new APIs to the following WinRT namespaces:$$$$$$Windows.AI.Actions$$$Windows.Management.Update$$$Windows.Media.Core
Microsoft Orca Version 10.1.26100.6901
Windows 11; Build 10.0.26100.6901 (released 10/2025)$$$Updates made to the following Win32 API headers; defines; structs; enums; and other changes:$$$$$$networksetup.h$$$windows.system.power.thermal.h$$$windows.ui.input.preview.text.h$$$Added new APIs to the following WinRT namespaces:$$$$$$Windows.AI.Actions$$$Windows.Management.Update$$$Windows.Media.Core
Microsoft Orca Version 10.1.26100.6584
Windows 11; Build 10.0.26100.6584 (released 9/2025)$$$Updates made to the following Win32 API headers; defines; structs; enums; and other changes:$$$$$$winnt.h$$$WtsApi32.h$$$wtsdefs.h$$$wtsprotocol.h$$$NetworkSetup.h$$$FoundationManifestSchema.xsd$$$AccessControlManifestSchema.xsd$$$AppDataManifestSchema.xsd$$$Added new APIs to the following WinRT headers and idl:$$$$$$windows.security.credentials.h$$$windows.system.power.thermal.h; windows.system.power.thermal.idl$$$Updated or added experimental APIs to the following:$$$$$$windows.ai.actions.h$$$windows.ai.actions.hosting.h$$$windows.ai.agents.mcp.h$$$windows.ai.agents.h$$$windows.graphics.printing.printsupport.h$$$windows.graphics.printing.printticket.h; windows.graphics.printing.printticket.idl$$$windows.devices.printers.h$$$windows.applicationmodel.contacts.h$$$Release to correspond with the Windows 11; version 25h2 public release.
Microsoft Orca Version 10.1.26100.6584
Windows 11; Build 10.0.26100.6584 (released 9/2025)$$$Updates made to the following Win32 API headers; defines; structs; enums; and other changes:$$$$$$winnt.h$$$WtsApi32.h$$$wtsdefs.h$$$wtsprotocol.h$$$NetworkSetup.h$$$FoundationManifestSchema.xsd$$$AccessControlManifestSchema.xsd$$$AppDataManifestSchema.xsd$$$Added new APIs to the following WinRT headers and idl:$$$$$$windows.security.credentials.h$$$windows.system.power.thermal.h; windows.system.power.thermal.idl$$$Updated or added experimental APIs to the following:$$$$$$windows.ai.actions.h$$$windows.ai.actions.hosting.h$$$windows.ai.agents.mcp.h$$$windows.ai.agents.h$$$windows.graphics.printing.printsupport.h$$$windows.graphics.printing.printticket.h; windows.graphics.printing.printticket.idl$$$windows.devices.printers.h$$$windows.applicationmodel.contacts.h$$$Release to correspond with the Windows 11; version 25h2 public release.
Microsoft Orca Version 10.1.26100.6584
Windows 11; Build 10.0.26100.6584 (released 9/2025)$$$Updates made to the following Win32 API headers; defines; structs; enums; and other changes:$$$$$$winnt.h$$$WtsApi32.h$$$wtsdefs.h$$$wtsprotocol.h$$$NetworkSetup.h$$$FoundationManifestSchema.xsd$$$AccessControlManifestSchema.xsd$$$AppDataManifestSchema.xsd$$$Added new APIs to the following WinRT headers and idl:$$$$$$windows.security.credentials.h$$$windows.system.power.thermal.h; windows.system.power.thermal.idl$$$Updated or added experimental APIs to the following:$$$$$$windows.ai.actions.h$$$windows.ai.actions.hosting.h$$$windows.ai.agents.mcp.h$$$windows.ai.agents.h$$$windows.graphics.printing.printsupport.h$$$windows.graphics.printing.printticket.h; windows.graphics.printing.printticket.idl$$$windows.devices.printers.h$$$windows.applicationmodel.contacts.h$$$Release to correspond with the Windows 11; version 25h2 public release.
Microsoft Orca Version 10.1.26100.4948
Updates made to the following Win32 API headers; adding new defines; structs; enums; and other changes:$$$ModelContextProtocolHelpers.h$$$PrintSupportManifestSchema_v3.xsd$$$$$$Added new APIs to the following WinRT headers and idl:$$$windows.graphics.printing.printsupport.h$$$windows.storage.provider.h$$$windows.devices.printers.h$$$windows.applicationmodel.activation.h$$$windows.ui.input.preview.text.h$$$$$$Removed experimental tag from:$$$windows.ui.input.preview.text (APIs previously behind ENABLE_WINRT_EXPERIMENTAL_TYPES are now stable)
Microsoft Orca Version 10.1.26100.4948
Updates made to the following Win32 API headers; adding new defines; structs; enums; and other changes:$$$ModelContextProtocolHelpers.h$$$PrintSupportManifestSchema_v3.xsd$$$$$$Added new APIs to the following WinRT headers and idl:$$$windows.graphics.printing.printsupport.h$$$windows.storage.provider.h$$$windows.devices.printers.h$$$windows.applicationmodel.activation.h$$$windows.ui.input.preview.text.h$$$$$$Removed experimental tag from:$$$windows.ui.input.preview.text (APIs previously behind ENABLE_WINRT_EXPERIMENTAL_TYPES are now stable)
Microsoft Orca Version 10.1.26100.4654
Updates made to the following Win32 API headers; adding new defines; structs; enums and other changes:$$$$$$bugcodes.h$$$d3d12.h$$$d3d12.idl$$$DbgEng.h$$$fwpmu.h$$$hidusage.h$$$ksarm64.h$$$minidumpapiset.h$$$ModelContextProtocolHelpers.h$$$ntddstor.h$$$ntddvdeo.h$$$ntlsa.h$$$ntstatus.h$$$nvme.h$$$Raseapif.h$$$sherrors.h$$$srb.h$$$WaaSApiTypes.h$$$WaaSApiTypes.idl$$$webauthn.h$$$winbio_types.h$$$winerror.h$$$WinHvPlatformDefs.h$$$winioctl.h$$$Added new APIs to the following Win32 headers:$$$$$$wincodec.h; wincodec.idl$$$IWICBitmapFrameChainReader$$$IWICBitmapFrameChainWriter$$$IWICDisplayAdaptationControl2$$$wincodecsdk.h; wincodecsdk.idl$$$GUID_MetadataFormatGainMap$$$CLSID_WICGainMapMetadataReader$$$CLSID_WICGainMapMetadataWriter$$$Added new WinRT Preview namespaces$$$$$$windows.ui.input.preview.text
Microsoft Orca Version 10.1.26100.4654
Updates made to the following Win32 API headers; adding new defines; structs; enums and other changes:$$$$$$bugcodes.h$$$d3d12.h$$$d3d12.idl$$$DbgEng.h$$$fwpmu.h$$$hidusage.h$$$ksarm64.h$$$minidumpapiset.h$$$ModelContextProtocolHelpers.h$$$ntddstor.h$$$ntddvdeo.h$$$ntlsa.h$$$ntstatus.h$$$nvme.h$$$Raseapif.h$$$sherrors.h$$$srb.h$$$WaaSApiTypes.h$$$WaaSApiTypes.idl$$$webauthn.h$$$winbio_types.h$$$winerror.h$$$WinHvPlatformDefs.h$$$winioctl.h$$$Added new APIs to the following Win32 headers:$$$$$$wincodec.h; wincodec.idl$$$IWICBitmapFrameChainReader$$$IWICBitmapFrameChainWriter$$$IWICDisplayAdaptationControl2$$$wincodecsdk.h; wincodecsdk.idl$$$GUID_MetadataFormatGainMap$$$CLSID_WICGainMapMetadataReader$$$CLSID_WICGainMapMetadataWriter$$$Added new WinRT Preview namespaces$$$$$$windows.ui.input.preview.text
Microsoft Orca Version 10.1.26100.4188
Windows 11; Build 10.0.26100.4188 (released 5/2025)$$$Added or updated new APIs to the following WinRT namespaces:$$$$$$Windows.AI.Actions$$$Windows.AI.ModelContextProtocol (experimental)$$$Windows.ApplicationModel.Background.Bluetooth$$$Windows.Devices.Bluetooth$$$Windows.UI.ViewManagement$$$Added new APIs to the following Win32 headers:$$$$$$http.h$$$HttpQueryRequestProperty$$$ntlsa.h$$$LsaSetLocalSystemAccess$$$LsaQueryLocalSystemAccess$$$LsaQueryLocalSystemAccessAll$$$WinUser.h$$$ConvertToInterceptWindow$$$IsInterceptWindow$$$ApplyWindowAction$$$RegisterCloakedNotification$$$EnterMoveSizeLoop$$$Updates made to the Win32 CRT headers:$$$$$$corecrt_search.h$$$wchar.h$$$Updates made to the following Win32 API headers; adding new defines; structs and enums:$$$$$$CertSrv.h$$$codecapi.h$$$dwmapi.h$$$MDMRegistration.h$$$mfapi.h$$$ntddvdeo.h$$$NTSecAPI.h$$$NTSecPKG.h$$$ntstatus.h$$$overridecapabilities.h$$$Propkey.h$$$WindowsSearchErrors.h$$$Winldap.h$$$rpcndr.h$$$winerror.h$$$Added new Win32 API header:$$$$$$ModelContextProtocolHelpers.h$$$Added experimental APIs to the following Win32 API headers:$$$$$$webauthn.h$$$WinBio.h$$$winbio_types.h
Microsoft Orca Version 10.1.26100.4188
Windows 11; Build 10.0.26100.4188 (released 5/2025)$$$Added or updated new APIs to the following WinRT namespaces:$$$$$$Windows.AI.Actions$$$Windows.AI.ModelContextProtocol (experimental)$$$Windows.ApplicationModel.Background.Bluetooth$$$Windows.Devices.Bluetooth$$$Windows.UI.ViewManagement$$$Added new APIs to the following Win32 headers:$$$$$$http.h$$$HttpQueryRequestProperty$$$ntlsa.h$$$LsaSetLocalSystemAccess$$$LsaQueryLocalSystemAccess$$$LsaQueryLocalSystemAccessAll$$$WinUser.h$$$ConvertToInterceptWindow$$$IsInterceptWindow$$$ApplyWindowAction$$$RegisterCloakedNotification$$$EnterMoveSizeLoop$$$Updates made to the Win32 CRT headers:$$$$$$corecrt_search.h$$$wchar.h$$$Updates made to the following Win32 API headers; adding new defines; structs and enums:$$$$$$CertSrv.h$$$codecapi.h$$$dwmapi.h$$$MDMRegistration.h$$$mfapi.h$$$ntddvdeo.h$$$NTSecAPI.h$$$NTSecPKG.h$$$ntstatus.h$$$overridecapabilities.h$$$Propkey.h$$$WindowsSearchErrors.h$$$Winldap.h$$$rpcndr.h$$$winerror.h$$$Added new Win32 API header:$$$$$$ModelContextProtocolHelpers.h$$$Added experimental APIs to the following Win32 API headers:$$$$$$webauthn.h$$$WinBio.h$$$winbio_types.h
Microsoft Orca Version 10.1.26100.3916
Windows 11; Build 10.0.26100.3916 (released 4/2025)$$$$$$Added new APIs to the windows.ui.viewmanagement WinRT namespace to support the users preferred UserInteractionMode.$$$Added support for semantic search to the searchapi.h Win 32 API header.$$$Added new GamingExperience Win32 API header.$$$Added new APIs to the following Win32 headers:$$$dcomp.h$$$http.h$$$ntsecpkg.h$$$winioctl.h
Microsoft Orca Version 10.1.26100.3624
Windows 11; Build 10.0.26100.3624 (released 3/2025)$$$Added gamepad support to the CoreInputViewKind enumeration in the windows.ui.viewmanagement.core WinRT namespace.$$$$$$Added new APIs to the following Win32 headers:$$$$$$fileapi.h$$$ntlsa.h$$$shobjidl_core.h$$$softintrin.h$$$webauthn.h$$$webservices.h$$$winenclaveapi.h$$$winnt.h
Microsoft Orca Version 10.1.26100.3323
Windows 11; Build 10.0.26100.3323 (released 2/2025)$$$$$$Renamed the PrivacyScreen WinRT APIs added to the windows.devices.sensors namespace in the previous build. These are now OnlookerDetection APIs.
Microsoft Orca Version 10.1.26100.3037
Added new WinRT APIs in the *windows.devicies.sensors namespace:$$$ PrivacyScreenOptions class.$$$ HumanPresenceSettings.PrivacyScreenOptions method.$$$ LightSensor.IsChromaticitySupported method.$$$ New properies and structs were also added to support these methods.$$$Experimental APIs were changed within the following Win32 header (please note that Expertimental APIs should not be used in a production environment):$$$ webauthn.h
Microsoft Orca Version 10.1.26100.2454
Made major additions or changes to the following Win32 headers:$$$$$$windows.applicationmodel.background.h: Added many bluetooth-related APIs.$$$windows.applicationmodel.calls.h: Added many VOIP call configuration APIs.$$$Many experimental APIs were added to the following Win32 header (Please note that experimental APIs should not be used in a production environment):$$$$$$webauthn.h$$$Added or modified the following Win32 APIs:$$$$$$certsrv.h:$$$$$$CRL_BUILD_PROPID$$$CRL_EXTRACT_KEY_INDEX$$$CRL_EXTRACT_PARTITION_INDEX$$$clusapi.h:$$$$$$NodeSriovInfo$$$combaseapi.h:$$$$$$STDMETHOD_CHPE_PATCHABLE$$$d2d11.h:$$$$$$d3d11.D3D11_FEATURE_DATA_D3D11_OPTIONS6$$$filter.h:$$$$$$IPixelFilter$$$IPixelFilter.GetImageInfo$$$IPixelFilter.GetPixelsForImage$$$IMAGE_INFO$$$IPixelFilterVtbl$$$http.h:$$$$$$_HTTP_REQUEST_TRANSPORT_IDLE_CONNECTION_TIMEOUT_INFO$$$msclus.h:$$$$$$NodeSriovInfo$$$ntsecapi.h:$$$$$$_KERB_CHANGEMACHINEPASSWORD_REQUEST$$$winenclaveapi.h:$$$$$$EnclaveEncryptDataForTrustlet$$$EnclaveUsesAttestedKeys$$$winnt.h:$$$$$$STDAPI_CHPE_PATCHABLE_$$$winuser.h:$$$$$$GetCurrentMonitorTopologyId$$$Please follow best practices to ensure an API is available on a machine before it is called.
Microsoft Orca Version 10.1.26100.1742
Release notes and known issues$$$Windows 11; Build 10.0.26100.1742 (released 9/24/2024)$$$Release to correspond with the Windows 11; version 24h2 public release.
Microsoft Orca Version 10.1.26100.1
***There is no release notes available for this application*** For more information refer https://developer.microsoft.com/en-us/windows/downloads/windows-sdk/#release-notes-and-known-issues
Microsoft Orca Version 10.1.22621.3233
***There is no release notes available for this application*** For more information refer https://developer.microsoft.com/en-us/windows/downloads/windows-sdk/#release-notes-and-known-issues
Microsoft Orca Version 10.1.22621.2428
***There is no release notes available for this application*** For more information refer https://developer.microsoft.com/en-us/windows/downloads/windows-sdk/#release-notes-and-known-issues
Microsoft Orca Version 10.1.22621.1778
***There is no release notes available for this application*** For more information refer https://developer.microsoft.com/en-us/windows/downloads/windows-sdk/#release-notes-and-known-issues
