Microsoft distributes UCRT and API set updates through Windows Update. Installing the latest cumulative updates ensures your system has all the latest runtime components.
If you are on Windows 7 or 8.1, the software you are trying to run likely your OS. Upgrading to Windows 10 or 11 is the only permanent fix.
Windows has a built-in tool designed to find and automatically repair missing or corrupted system files like api-ms-win-core-memory-l1-1-6.dll . Type in the Windows search bar. Right-click Command Prompt and select Run as Administrator . Type sfc /scannow and press Enter .
: If the error only happens with one program (like Halo Infinite or Skype), uninstall and reinstall that specific application. 💡 Specific Scenarios api-ms-win-core-memory-l1-1-6.dll missing
Before diving into the fixes, it helps to understand why Windows lost track of this file.
Appendix: Useful tools
DISM /Online /Cleanup-Image /RestoreHealth Microsoft distributes UCRT and API set updates through
This specific API set version ( l1-1-6 ) is native to newer Windows builds. If you are running an outdated version of Windows 7, 8, or early builds of Windows 10, modern software will look for this file and fail to find it.
– Even if the file isn't malicious, downloading from unofficial sources means you may get the wrong version, architecture (32-bit vs. 64-bit), or build for your system.
Third-party antivirus, system optimizers, or leftover software from uninstalled programs can block or delete DLLs. A Clean Boot starts Windows with minimal drivers and startup programs. Upgrading to Windows 10 or 11 is the only permanent fix
: The application may rely on libraries that haven't been properly installed or updated on your system.
The api-ms-win-core-memory-l1-1-6.dll file is a critical system component associated with the Windows API (Application Programming Interface). Specifically, it belongs to the and the Universal C Runtime (UCRT) . Its primary role is to manage memory operations—allocation, deallocation, and paging—for modern applications, especially those built with newer versions of Visual Studio (2015, 2017, 2019, or 2022).