In case your OpenVPN on windows 8 is not working properly. You may need to do the instructions below.
It looks like OpenVPN requires the “Network Connections” service to be running. Simply change this service from manual to automatic (so you don’t have to do this again) and start it. OpenVPN should then connect correctly with no warnings.
http://visualplanet.org/blog/wp-content/uploads/2012/11/netwrokconnections-265x300.jpgYou may also need to enable ‘RAS Connection Manager’ which is disabled be default on windows 8.
Just go to Control Panel\Programs\Programs and Features
‘Turn Windows features on or off’
Turn On ‘RAS Connection Manager Administration Kit (CMAK)’
OK
Close the window and test your OpenVPN connection.