Spotflux is a program that gets rid of ads, viruses, cookies, etc which would otherwise overload browsing, thus slowing down what you wish to see on your computer. With Spotflux, you should be able to browse the Internet a bit more freely, rapidly or smoothly. I have tried Spotflux tonight and it works fast and fine.
VPN is Virtual Private Network. Usually hospitals are given VPN for communicating between hospitals and health centres. Patient data are also sent via VPN so they travel without data loss. For those without VPN, Spotflux should do just the same.