Appendix: Consolidating the Logs in the Cloud Using OpenVPN : Configuring the Cloud Server : Install OpenVPN
  
Install OpenVPN
Download the OpenVPN installer .exe file for Windows from the site at openvpn.net/community-downloads. Run the installer .exe file and follow the steps in the Setup wizard that appears:
Select all components to install, including EasyRSA 2 Certificate Management Scripts. You will need this component to build the certificates.
Accept the default installation folder, %ProgramFiles%\OpenVPN. This folder will also store the configuration of the OpenVPN server.
When prompted, agree to install the TAP device software. This virtual network device provides connection and data exchange between the OpenVPN server and its clients.
OpenVPN requires Microsoft .NET Framework 4.0 or later. If prompted by the Setup wizard, install the latest version of the .NET Framework. For installation instructions, see Microsoft’s article at docs.microsoft.com/dotnet/framework/install.
Once you have completed the Setup wizard, you can move on to configure the server.