The Microsoft Visual C++ 2015 Redistributable (x64) is a package of shared code libraries that allows your computer to run 64-bit applications developed using Visual Studio 2015.
: Provides the necessary code (DLLs) that programs need to execute specific functions without the developer having to bundle those files with every individual app. System Architecture
Conclusion
While not always required, rebooting ensures that all newly installed DLLs are properly registered.
Common Fixes: If you encounter installation errors (like code 1603 or "Setup Failed"), they are often caused by corrupted caches or existing newer versions already on the system. Repairing the installation via the Control Panel > Programs and Features is usually the safest first step.
Never download vcruntime140.dll or any system DLL from a “DLL download” website. These files can be outdated, malicious, or incorrect. Always obtain redistributable packages directly from Microsoft’s official download center.
The program can't start because vcruntime140.dll is missing.api-ms-win-crt-runtime-l1-1-0.dll is missing.Each version is unique. An older game might specifically require the 2010 version, while a newer app needs the 2015 version. Deleting them will cause those programs to stop functioning immediately. They take up very little space and are best left alone unless you are troubleshooting a specific error.
msiexec /x YourProductCode /quiet /norestart
