: Many mission-critical enterprise tools and older "abandonware" games still rely on these specific libraries to function.
When you installed the VC6 Redistributable, you were placing these system files into your Windows System32 folder, allowing any application compiled with VC6 to run seamlessly. microsoft visual c 6.0 redistributable
A: Because VC6 is out of extended support. Microsoft classifies it as a "retired" product. Providing it via Windows Update would imply ongoing security support, which Microsoft refuses to offer. Microsoft classifies it as a "retired" product
Modern Windows uses "Side-by-Side" (SxS) assemblies to allow multiple versions of the same DLL to exist simultaneously. However, VC6 predates this technology. It was a "global" installation, usually dumping files directly into C:\Windows\System32 . This creates conflicts if a newer application overwrites the VC6 files with incompatible versions. However, VC6 predates this technology
The is a package of these runtime DLLs. When a developer compiled an application using Visual Studio 6.0, they would check a box to "Use MFC in a shared DLL." That meant the end-user needed the redistributable installed before running the software.
However, Visual C++ 6.0 was born before this solution matured. This makes installing the official redistributable on a modern system a potentially "dirty" operation, as it attempts to write files into protected system directories that modern Windows (Vista, 7, 8, 10, and 11) aggressively protects.
: You must use the version (x86 for 32-bit or x64 for 64-bit) that matches your application's architecture. Why You Might Still Need It Today