Sandboxie is an application that is like a cover up for your OS. This means that you can run all your programs separately from OS. By doing this, you have a better protection against viruses, malwares and such, because although you are running an infected application, it cannot affect your Operating System.
This software has been tested on Windows 7 x64 and it installs and works flawlessly. For more FAQ about this product, you can visit the following official web page.