Microsoft shifted to a "Universal" model to solve this. KB2999226 brings the Windows 8.1 operating system up to speed with the Windows 10 architecture regarding how it handles C++ programming libraries.
"The program can't start because api-ms-win-crt-runtime-l1-1-0.dll is missing from your computer."
If you have ever tried to install a modern piece of software—like —on Windows 8.1 or Windows Server 2012 R2, you’ve probably run into a cryptic error message that led you here:
While KB2999226 is primarily a compatibility update, it does include security fixes for:
In the past, developers had to bundle specific C++ library files with their applications, or users had to install the "Visual C++ Redistributable" packages for every different version of Visual Studio.
Windows 8.1 reached end of life on . No more security updates. But many legacy systems (industrial control, medical devices, air-gapped networks) still run 8.1.