Sandboxie (64-bit) is a robust security solution designed to provide a layer of defense against various security threats by isolating applications from the underlying operating system and file system. It achieves this by creating a sandbox environment for each application, where the program can execute and interact with files and resources within the sandbox without affecting the rest of the system. Any changes made by the sandboxed program are contained within the sandbox and can be easily discarded, ensuring that the system remains protected from potential harm.