BufferZone Pro is a free sandboxing tool that automatically runs your internet tools in an isolated environment, making it much more difficult for malware to infect or damage your PC.
The program is easier to use than many similar applications. There are no complicated options to consider, you just install BufferZone Pro, reboot, and immediately it'll run your browsers, instant messaging tools, P2P file sharing programs and other internet apps in the sandbox. And to highlight this, each program will have a red border drawn around its window, so you can see immediately that you're protected.
This won't always be convenient, of course, and so BufferZone can also be reconfigured to suit your needs. Trusted files can be opened outside of the program, if you like; particular internet applications can be launched as usual, without going through BufferZone; and while it's set up to work with internet tools, you can also run other apps within the sandbox, when necessary.
And you can also configure the program to work in a very minimal way, only popping up when necessary. The Privacy Zone, for example, allows you to enter your internet banking sites or any other pages which contain very sensitive information. And once this is set up, BufferZone will automatically isolate your browser whenever you visit these sites (though only in IE), helping to ensure your privacy.