Supported termination while the initial CREATE_PROCESS_DEBUG_EVENT remains pending
I am reviewing a hypothetical Windows launcher design. No implementation or debugging experiment is being reported. Assume the following state: CreateProcessW created a new process using DEBUG_ONLY_THIS_PROCESS. The creating/debugger thread received…
Windows development | Windows API - Win32
How to configure IIS 10 IISCertificateMappingAuthenticationModule for a classic mode application.
We are using IIS 10 on Windows Server 2022 servers to run a classic mode soap application, and we are now required to convert to IISCertificateMappingAuthentication from AnonymousAuthentication. All my attempts at reconfiguring the IIS security have been…
Windows development | Internet Information Services
Does Windows 11 support exact-version activation for full-trust desktop MSIX?
On Windows 11 x64, a normal non-elevated desktop caller independently authorizes PackageFullName A and a manifest Application ID for a registered full-trust desktop MSIX staged in Windows-managed storage, with package integrity enforcement intended. The…
Windows development | Windows API - Win32
AI answer
Xbox Dev Mode stuck in "Device is being processed" for 4 days
Hello, I am experiencing an issue with Xbox Developer Mode that appears to be related to the Microsoft backend. Console: Xbox Series S Issue timeline: Developer Mode was working normally. Suddenly, I was no longer able to sign in to my Microsoft account…
Windows development | Windows Performance Toolkit
NtCreateFile: Is FILE_DIRECTORY_FILE compatible with FILE_OPEN_REPARSE_POINT for secure directory creation?
Dear Microsoft Windows Developer Support Team, We are developing a Windows desktop application that requires secure directory creation using native Windows filesystem APIs. During our implementation review, we identified an ambiguity in Microsoft's…
Windows development | Windows API - Win32
Supported TPM 2.0 NV Counter and Extend provisioning on Windows 10/11
On Windows 10/11 x64 with a normally Windows-provisioned TPM 2.0, is there a supported application route to create and subsequently reopen an application-owned, non-ORDERLY 8-byte NV Counter and non-ORDERLY SHA-256 NV Extend index? Please clarify these…
Windows development | Windows API - Win32
Windows SDK 10.0.26100.4654: Redistribution rights for five x64 UCRT DLLs missing from REDIST.TXT
We have acquired and accepted the license terms for Windows SDK for Windows 11, version 10.0.26100.4654 (July 2025). We are preparing a commercial classic Windows desktop application and would like to clarify the redistribution permissions for five…
Windows development | Windows API - Win32
Supported external association between active IME composition and its rendering window
Question We are building an external window-sharing tool. Which supported API combination associates a selected application's current input/composition context with its separate Microsoft IME preedit rendering HWND (or equivalent capturable surface),…
Windows development | Windows API - Win32
How should I interpret local WACK DPI and Blocked executables findings for a packaged Win32 app?
I tested a full-trust x64 MSIX desktop app on Windows 11 Pro 25H2 (build 26200.9818) with WACK 10.0.28000.2957. Both the one-file and one-folder builds produced the same results: 22 PASS, optional TEST88 (Blocked executables) FAIL, and TEST92…
Windows development | Windows API - Win32
Does user-mode NtCreateFile support OBJ_DONT_REPARSE with a directory RootDirectory handle?
I am developing a user-mode Windows application that needs to safely resolve file-system directory entries relative to a trusted parent directory handle, without following unapproved reparse points. I found a potential ambiguity between two Microsoft…
Windows development | Windows API - Win32
Windows Job Object: Can a rejected memory commit increase PeakJobMemoryUsed beyond JobMemoryLimit?
Windows Job Object: Can a rejected memory commit increase PeakJobMemoryUsed beyond JobMemoryLimit? On Windows, we are testing a Job Object configured with both JOB_OBJECT_LIMIT_JOB_MEMORY and JOB_OBJECT_LIMIT_PROCESS_MEMORY. The job-wide hard limit is…
Windows development | Windows API - Win32
Overflow of FETCH Placeholder callback requests inside cloud filter api
Problem statement: We noticed that we intermittently get an error pop up on explorer: "Error 0x800701AA means "The cloud operation was not completed before the time-out period expired." for FETCH_PLACEHOLDERS callback for some folders (not…
Windows development | Windows API - Win32
Windows AppContainer process fails to start with error 0xC0000142
I need help diagnosing a Windows application startup problem. A Python process exits with error 0xC0000142 (STATUS_DLL_INIT_FAILED) before it produces any output. A simple Python startup test fails with the same error in both an ordinary AppContainer and…
Windows development | Windows API - Win32
Windows 11 AppContainer: Is a package SID ACE with CRITICAL_ACE_FLAG equivalent to an inherited capability SID ACE?
I'm investigating a Windows filesystem security-descriptor change affecting six MicrosoftWindows.Client.CBS / Edge WebView2 resources on Windows 11 26H2 (build 26300.9711). During a controlled removal of an unrelated inherited user ACE, Windows ACL…
Windows development | Windows API - Win32
Is NtCreateFile with FILE_OPEN_REPARSE_POINT supported for relative directory opens on Windows 11?
Dear Microsoft Windows SDK Support, I am requesting an authoritative clarification of the supported user-mode API contract for NtCreateFile on Windows 11. The intended use is a read-only metadata inspection mechanism that opens one filesystem path…
Windows development | Windows API - Win32
NtCreateFile: Supported API contract for secure handle-relative file and directory creation with reparse-point protection
Hello, I am designing a reusable security-sensitive Windows filesystem component and would appreciate clarification from Microsoft Windows Filesystem / Object Manager specialists regarding the officially supported API contract for creating files and…
Windows development | Windows API - Win32
Windows 11 26H2 (26300.9818): GetTcpTable2 returns state 0 for a verified listening socket
Windows_TCP_SyntheticResult.txtWindows 11 26H2 build 26300.9818: native IPv4 TCP tables report state 0 for a demonstrably listening synthetic socket Summary I observed an inconsistency between a socket owned by a small standalone Python program and the…
Windows development | Windows API - Win32
Windows NTFS — Supported user-mode primitive for no-replace publication of an existing file
I'm researching a Windows application that writes and flushes a staged file, closes its handle, and then publishes the completed file under a destination pathname. The requirements are: Never replace an existing destination. Prevent competing publishers…
Windows development | Windows API - Win32
SignTool in SDK BuildTools 10.0.28000.2957: cache-only verification and result evidence
Please identify existing, version-applicable documentation or an independently reviewed implementation record for SignTool distributed through Microsoft.Windows.SDK.BuildTools 10.0.28000.2957. We need clarification on two points before recommending…
Windows development | Windows API - Win32
Microsoft Software KSP: exact CNG signing ACE masks and protected DACL enforcement
We need provider-specific technical clarification for the Microsoft Software Key Storage Provider (Software KSP) regarding access control on persisted CNG signing keys. Scenario We intend to provision two separate LocalMachine ECDSA P-256 signing keys,…