mysql installation failure record

The cause of the problem is generally that the path of the Visual C++ Redistributable automatically installed by mysql is incorrect or even the x64 mysql recognizes the x86 installation path, so the solution is to manually download the Visual C++ Redistributable installation from Microsoft. The official download path of Microsoft in Simplified Chinese is: https : //www.microsoft.com/zh-CN/download/details.aspx?id=40784  , click the download button and download both vcredist_x64 and vcredist_86. Install vcredist_x64 first and then try to reinstall mysql 5.7.20. If the error is still reported, Then install vcredist_x86 and then install mysql again to solve the problem.