So after Successful installation of the VIvado IDE if you are facing Error as "Incorrect version of the Microsoft C++ redistributable package" as shown in the fig. Follow the below step to remove this error.

Go to  Folder where you installed Vivado -> 2018.3(Version you installed) -> tps -> win64 -> you will find at the bottom you have xvcredist.exe . Just rename that file to vcredist and start Vivado. Now it iwll start working.