The l1-1-1 variant of this API set was introduced in later versions of Windows 10 and Windows 11. If you are running Windows 7, Windows 8, or an early build of Windows 10, the software you are trying to run requires a system file that simply does not exist on your OS.
It sounds like you're dealing with a common but frustrating "Missing DLL" error. Specifically, is part of the Windows API Set , a system designed to improve modularity in Windows. When this file is missing, programs that rely on Windows Error Reporting (like games or Minecraft) fail to launch. 🛠️ The Solution (The "Paper")
Install both the and x64 versions if you have a 64-bit system. Reboot your PC to ensure changes take effect. 2. Run System File Checker (SFC) and DISM apimswincorewindowserrorreportingl111dll
Most api-ms-win-... errors are fixed by updating the environment the app runs in.
: Do not download individual .dll files from random "DLL fixer" websites. These files are often outdated, the wrong version, or bundled with malware. Always use official Microsoft installers or system updates. The l1-1-1 variant of this API set was
Follow these methods in order to resolve the issue, starting with the most common solutions. 1. Reinstall/Update Microsoft Visual C++ Redistributable
Understanding and Fixing the apimswincorewindowserrorreportingl111dll Missing Error Specifically, is part of the Windows API Set
If the error only happens when launching one specific app, that application's installation files might be damaged. Press , type appwiz.cpl , and press Enter . Find the program causing the error in the list. Right-click it and choose Uninstall .
Windows maintains backup copies of system files in the WinSxS folder (Side-by-Side assembly store). You can manually restore the file.
For your "paper" or research, here is the technical breakdown of what's happening under the hood:
Running an outdated version of Windows is a primary cause of missing API errors.