Sandboxie

Sandboxie will allow you to run your downloads in a sandbox to check whether or not they're what you were expecting. This can be great if you don't trust a download.


* 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.

* Windows Stays Lean:
Prevent wear-and-tear in Windows by installing software into an isolated sandbox.


Requirements.
Sandboxie works on Windows 2000, Windows XP, Windows Vista and Windows Server 2003.
Sandboxie does not work on Windows 95, 98 or ME, or on Mac operating systems.
There are no particular hardware requirements. Sandboxie needs only a small amount of memory and should have a very small impact on performance.

Windows 2000 users.
You may need to install GDIPLUS.DLL if you don't already have it.

Languages.
English, Chinese (Simplified), Finnish, German, Japanese, Korean, Polish, Portuguese (Brasil) and Turkish.



Rapidshare Download:
Credits to Demonskull for the rapidshare link:
http://rapidshare.com/files/152194460/Sandboxie3.rar

Official Download:
http://www.sandboxie.com/SandboxieInstall.exe