I am experiencing troubles with slow speed using vyprvpn on a Windows 10 64 bit machine.
I normally achieve 120mps without a VPN connection and only 30-35 using the openVPN protocol.
Support is only claiming my ISP although I am able to have 90MPs using an iPad and the same network and ISP.
This should proof that there is no problem caused by the ISP. Btw I used another VPN provider earlier and was able to achieve 100 Mps with the same ISP.
Maybe some of you have ideas how the speed could be improved.