Msvcr100.Dll Is Missing error can be frustrating because you're often told it's missing but not shown how to fix it. The msvcr100.dll error is because you don't have the correct Visual C++ libraries installed for the program causing the error, and it's simple to fix. You could also get a 0xc000007b error.
Visual C++ Libraries (or runtimes) are the end-user files for any program, app, or game written in Visual C++. The end-user, of course, has no idea what language a program is written in or that they need the runtimes. This only adds to the frustration with the msvcr100.dll error.
Adding to the Visual C++ confusion, there are numerous versions named by year going back to 2005. Let's try and sort out the confusion.
One problem this might not solve is if you need an older version of the Microsoft Visual C++ runtimes. This is a solution to look at if you're getting this error when running an older app or game. At least two third-party apps will install all of the Microsoft Visual C++ runtimes. While this may seem overkill, it's helped more people than not.
Visual C++ Runtime Installer (All-In-One) Visual C++ Runtime Installer (All-In-One) is a single batch file installer that includes all Visual C++ libraries built-in, and a video tutorial is available.
MultiPack Visual C++ Installer MultiPack Visual C++ Installer is designed to install all Microsoft Visual C++ end-user runtimes. Run the app, and it installs everything for you.
Hopefully, we solved the msvcr100.dll error for you.