Sandboxie

Sandboxie is a program that allows you to run executable files in an isolated environment to protect your data from damage by malicious or improperly running software.

What Sandboxie gives you

• Secure web surfing. Running your browser from an isolated environment ensures you're protected from web-based malware.
• Browser history, cookies, and temporary files are guaranteed to be protected from leakage when you launch your browser from a protected environment.
• The system stays clean: programs do not clutter the system directories with their files and your system continues to run fast and error-free from third-party software.