Microsoft Visual C 2019 2021

The "story" of Microsoft Visual C++ (MSVC) 2019–2021 is primarily about the transition from the "classic" development cycle to the modern era of and cross-platform compatibility. While 2019 and 2021 refer to specific versions of the Visual Studio IDE

(Integrated Development Environment), they share a common thread: binary compatibility 1. The 2019-2021 "Unified" Runtime

The most practical "story" for users is why you see "Visual C++ 2015-2019" or "2015-2022" in your programs list. Unlike older versions (2005, 2008, 2010), which were separate, Microsoft decided that all versions from 2015 onward would share the same Redistributable runtime The Good News:

This means you don't need a separate "2019" and "2021" installer; one modern package (v14x) covers everything released in that window. Why it matters: It prevents the "DLL Hell" of the past where a missing msvcp140.dll would break your favorite games or apps like OBS Studio Microsoft Learn 2. Visual Studio 2019: The Workhorse

Released in April 2019, this version became the industry standard for stability. C++20 Support:

By the end of its life cycle (version 16.11, released in late 2021), it added the /std:c++20 microsoft visual c 2019 2021

flag, finally allowing developers to use major new language features like Coroutines Free Access: It maintained the Community Edition

, allowing students and small teams to build professional software for free. Microsoft Learn 3. The 2021 Shift (Visual Studio 2022) In late 2021, Microsoft released Visual Studio 2022

. This was a "good story" for performance because it was the first version to be 64-bit (x64)

Microsoft follows a specific naming convention for these tools:

Below is a write-up covering the Visual C++ 2019 toolset and its transition into the 2021/2022 era. The "story" of Microsoft Visual C++ (MSVC) 2019–2021

Abstract

This paper examines the Microsoft Visual C++ (MSVC) compiler toolchain as part of Visual Studio 2019 (released 2019) and its major updates through 2021. It focuses on standards conformance (C++17/20), security enhancements, build throughput improvements, and the introduction of the /std:c++latest mode. The study finds that between 2019 and 2021, MSVC achieved near-full support for C++17, substantial C++20 feature completion, and significant parallel compilation optimizations, while maintaining backward compatibility with legacy code.

3.3 Performance

4.2 Toolchain Additions

Why this is a “good piece” for MSVC

  1. Uses Microsoft-specific secure functions (localtime_s) – shows awareness of MSVC’s security enhancements.
  2. Thread-safe – uses std::mutex for concurrent logging from multiple threads.
  3. Modern C++ – smart pointers, RAII, std::put_time, std::chrono.
  4. Extensible – easy to add more log levels, sinks (e.g., debug output via OutputDebugStringA for Windows).
  5. Practical – logging is essential in real applications.

If you want something more Windows-specific (e.g., using OutputDebugString, EventLog, or registry access), let me know.

Error 2: "VCRUNTIME140_1.dll is missing"

Notice the _1 at the end. This DLL was only introduced in the 2021 update (version 14.29). Older games don't need this. Newer games (like Halo Infinite or Forza Horizon 5) require it.

Why Do I Have So Many Versions? (2010, 2013, 2015, 2019, 2021...)

A common question from users who see Microsoft Visual C++ 2019 2021 alongside "2015" and "2017" is: Can I delete the old ones?

Absolutely not. Here is why:

Microsoft does not practice "backward compatibility" for C++ runtimes the way it does for standard Windows APIs.

They do not overwrite each other. They live side-by-side. Modern AAA games (like Call of Duty: Modern Warfare or Fortnite) often require multiple runtimes simultaneously. If you uninstall the "old" 2019 version, a game that specifically looks for the 2021 update will crash immediately.

Microsoft Visual C++ (2019–2021): Ecosystem, Runtimes, and Development

The period between 2019 and 2021 was pivotal for Microsoft’s C++ ecosystem. While the core compiler toolset is technically known as MSVC (Microsoft Visual C++), users most often encounter it through two distinct avenues: the Visual Studio IDE (for developers) and the Visual C++ Redistributable (for end-users).

This write-up clarifies the state of Visual C++ during this era, covering the release of Visual Studio 2019, the evolution of the compiler standards, and the ongoing necessity of the Redistributable packages.

Error 3: Installation Failed - "Another version of this product is already installed"

This is the most annoying error. Because Microsoft labels the 2021 update as a "new" product, Windows Installer sometimes gets confused. Microsoft Visual C++ 2019 refers to the compiler