Sandboxie

Sandboxie runs your programs in an isolated space which prevents them from making permanent changes to other programs and data in your computer.

Benefits of the Isolated Sandbox:

Secure Web Browsing: 

Running your Web browser under the protection of Sandboxie means that all malicious software downloaded by the browser is trapped in the sandbox and can be discarded trivially.

Enhanced Privacy: 

Browsing history, cookies, and cached temporary files collected while Web browsing stay in the sandbox and don't leak into Windows.

Secure E-mail: 

Viruses and other malicious software that might be hiding in your email can't break out of the sandbox and can't infect your real system.

Windows Stays Lean: 

Prevent wear-and-tear in Windows by installing software into an isolated sandbox.

By default Sandboxie is configured to load and start automatically. To have Sandboxie load only when you need it, make the following changes.

In Sandboxie Control, open the Configure -> Shell Integration window, and clear the checkbox When Windows starts to stop Sandboxie Control from starting.

Open the Windows Services configuration window: Start menu -> Control Panel -> Administrative Tools -> Services. Then locate the Sandboxie Service. Double click to bring up its properties window. Set its Startup type to Manual rather than automatic.

The driver component of Sandboxie is started by the Sandboxie Service. Therefore, setting the service to start manually, indirectly also sets the driver to start manually.

Starting Sandboxie Control will also start the service.

Think of your PC as a piece of paper. Every program you run writes on the paper. When you run your browser, it writes on the paper about every site you visited. And any malware you come across will usually try to write itself into the paper.

Traditional privacy and anti-malware software try to locate and erase any writings they think you wouldn't want on the paper. Most of the times they get it right. But first the makers of these solutions must teach the solution what to look for on the paper, and also how to erase it safely.

On the other hand, the Sandboxie sandbox works like a transparency layer placed over the paper. Programs write on the transparency layer and to them it looks like the real paper. When you delete the sandbox, it's like removing the transparency layer, the unchanged, real paper is revealed.