Sandboxie

Sandboxie runs your programs in an isolated space which prevents them from making permanent changes to other programs and data in your computer. It offers secure web browsing by running your Web browser under the protection of Sandboxie means that all malicious software downloaded by the web browser is trapped in the sandbox and can be discarded trivially. It has enhanced privacy where browsing history, cookies, and cached temporary files collected while Web browsing stay in the sandbox and don't leak into Windows. It prevents wear-and-tear in Windows by installing software into an isolated sandbox.

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.

Note: 30 days trial version.