If you see this error message when trying to start the WebCenter Content managed server for the first time on Windows
java.lang.UnsatisfiedLinkError: C:\Oracle\Middleware\Oracle_ECM1\ucm\idc\components\NativeOsUtils\lib\windows-amd64\7.2.1.1\JniNativeOsUtils.dll: The application has failed to start because its side-by-side configuration is incorrect. Please see the application event log or use the command-line sxstrace.exe tool for more detail
You have not installed the required Visual C++ Libraries.
See section 3.7.3 Downloading Visual C++ Libraries for a Windows Operating System in the WebCenter Content Installation Guide.