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 These files can be outdated, malicious, or incorrect.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.
At its core, the Microsoft Visual C++ Redistributable is a package of runtime components that are required to run applications developed with Microsoft Visual Studio, specifically those written in C++.
The designation “2015” refers to the underlying version of the Visual C++ runtime library (version 14.0). This is crucial because runtime libraries are not always backward compatible. A program built with Visual Studio 2015 expects runtime version 14.0, not version 12.0 (from Visual Studio 2013). microsoft visual c 2015 redistributable x64
The “x64” denotes the processor architecture. This particular package is for 64-bit (x86-64) systems. It contains 64-bit versions of the runtime DLLs, intended for 64-bit applications running on a 64-bit version of Windows. (The separate x86 version is for 32-bit applications, which run on both 32-bit and 64-bit Windows via emulation). A 64-bit application cannot use 32-bit DLLs, and vice versa, hence the need for architecture-specific redistributables.
Key files installed by this package (typically to C:\Windows\System32): Never download vcruntime140
Note on the Universal CRT: Starting with Visual Studio 2015, Microsoft restructured the runtime. The UCRT is now a Windows operating system component (Windows 10 and later have it built-in; Windows 7 and 8 receive it via Windows Update). This reduces the need for application-local copies but also creates unique compatibility scenarios across different Windows versions.
Cause: Corrupt system files or missing Windows updates.
Solution: At its core, the Microsoft Visual C++ Redistributable
| Feature | Detail |
|--------|--------|
| Package Name | Microsoft Visual C++ 2015 Redistributable (x64) |
| Primary DLLs | vcruntime140.dll, vcruntime140_1.dll, ucrtbase.dll, msvcp140.dll |
| Architecture | x64 (64-bit). For 32-bit apps, you need the x86 version. |
| System | Windows 7 SP1, 8, 8.1, 10, 11 (and compatible Server versions) |
| Version example | 14.0.24215.1 (or later updates) |
Note on versions: Microsoft has merged the 2015, 2017, 2019, and 2022 redistributables into a single package (version 14.x). Installing the latest Visual C++ 2015-2022 Redistributable will satisfy 2015 requirements. However, the standalone 2015 package still exists for legacy support.
