Take a look here:
https://www.bestvpn.com/blog/4147/pptp-vs-l2tp-vs-openvpn-vs-sstp-vs-ikev2/I prefer OpenVPN because it's open source, secure and very flexible, because all the protocol complexity is dispatched within a single UDP (or TCP) stream. It's comparatively easy to combine OpenVPN with other tunnels and proxies.
If you're stick with Windows and just make it working without caring about security, use the built-in PPTP.
- If you care about security while you don't shy doing some work, don't just ask for the best protocol. It's more work left to do.
- Use an isolated separated system for anonymous activites which isn't linked to your domestic identity.
- Use a second boot media/partition, a virtual machine or a dedicated old machine.
- Place a dedicated VPN linux router between your productive machine and your ISP which forces every outgoing connection over VPN. It still keeps you safe when your productive machine gets compromised.
- Inform yourself what the laws are. If you have a mandatory key disclosure law, don't encrypt your local machine but use a live CD excessively while renting&connecting to a offshore remote system anonymously where you're really operating from. If your country doesn't have a mandatory key disclosure law, encrypt everything.