install openvpn with provided installer.

copy .ovpn file and cert folder with contents to c:\users\yourname\openVPN\config

open openvpn gui and select connect or right click .openvpn file and select start openVPN on this config file.

if it gives a tls handshake failure you're gonna have to forward port 1194 UDP to your pc on your router, otherwise, profit (make sure your firewall isn't blocking openvpn)