Inspiron7000 VPN Issue

No matter what I try, I can't get my Inspiron to connect to my servers VPN. I suspect it to be something to do with fast boot but how do I disable?

I believe it's a NAT issue as it has been with other laptops I've had but the Inspiron seems to have some hardware quirks.

I have changed the registry for NAT traversal but I suspect this is not registering upon reboot because fastboot is still enabled in either win, bios or other.