If you are on a 64-bit operating system, it is smart to also download and install at the same time to prevent future compatibility issues. Step 3: Run the Installer
If you are looking for more specific troubleshooting based on an error message you're seeing, I can help you fix it. For instance: What is the ? What app or game were you trying to open? Visual C++ Redistributable Packages for Visual Studio 2013 vc2013redistx86