Download last version of OpenVPN (file Installer with extension .exe).
Start OpenVPN installation and Allow the application to make changes.
Leave all the settings by default.
Complete the OpenVPN installation for Windows 10.
OpenVPN has created folder for OpenVPN files.
In the "My Account" download OpenVPN files and extract the Zip archive to the Desktop.
Make sure file with name (Username VPN) was copied. This file is responsible for the automatic authentication on the VPN servers.
Connect to the OpenVPN server in Windows 10.