While package managers like PIP for python are easy to use and usually work flawlessly, there can be cases when things fail. While installing the pyAudio package for python in Windows using command pip install pyaudio I encountered error: Unable to find vcvarsall.bat the reason for this error could be many but usually means the library you are trying to install contains some C/C++ code and pip needs to compile them to get a binary. On Windows PIP tries to do that using Microsoft Visual Studio's compiler and when it is unable to find it, throws the error below. Luckily, the solution is very easy as shared ahead.