If you’re looking for free, fast and easy to use free VPN service without any ads then here is SecurityKISS Tunnel, which allows you to bypass internet censorship and local restrictions. This little tool is around 2.5MB in size, works with both 32-bit and 64-bit Windows, makes your connection secure and prevents others from viewing your web browsing activities, instant messages, downloads, credit card information or anything else you send over the network. The best part is you don’t have to register with the service to get connected and it gives you an option to choose between using a server in the United Kingdom or the United States.
But there are some limitations to the free version of the service though, such as 300MB/day of bandwidth. For security reasons they also collect information about user's IP address (so, it's not 100% anonymous) and connection time since they don’t need registration. Still, I highly recommend SecurityKISS Tunnel, as it is fast (because it guarantees Traffic compression), secure and support all applications on your computer as they are not aware of the tunnel.