Sandboxie is a proprietary sandbox-based isolation program developed by Ronen Tzur, for 32-bit Windows NT-based operating systems. It creates a sandbox-like isolated operating environment in which applications can be run or installed without permanently modifying the local or mapped drive. An isolated virtual environment allows controlled testing of untrusted programs and web surfing.

Sandboxie runs your programs in an isolated space which prevents them from making permanent changes to other programs and data in your computer. When you run a program on your computer, data flows from the hard disk to the program via read operations. The data is then processed and displayed, and finally flows back from the progam to the hard disk via write operations.

Sandboxie changes the rules such that write operations do not make it back to your hard disk.
??? Intercept changes to both your files and registry settings, making it virtually impossible for any software to reach outside the sandbox.
??? Traps cached browser items into the sandbox as a by-product of normal operation, so when you throw away the sandbox, all the history records and other side-effects of your browsing disappear as well.

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.

Translations: The following languages can be selected during installation: English, Albanian, Chinese (Simplified and Traditional), Czech, Finnish, French, German, Italian, Japanese, Korean, Polish, Portuguese (Brasil), Russian and Turkish.

Windows 2000: You may need to install GDIPLUS.DLL if you don't already have it.
Windows 64-bit: Not supported. Please read more here.
Windows 7: 32-bit Windows 7 (build 7000 only) is partially supported by Sandboxie version 3.36.

New Features:
* New application configuration system makes it easy to activate configurations and resolve conflicts with third-party software.
* Intercept AutoPlay notifications for better protection of CD/DVD and USB drives which are protected (forced) by Sandboxie.

Fixes:
* Sandboxie Control does not abort if the tray icon cannot be installed.
* Border around sandboxed windows uses less CPU resources and does not appear around full screen Web video windows.
* Fixes related to Windows Vista:
o Support "Run As" UAC elevation requests for sandboxed programs.
o Fixed a problem with Internet Explorer 8 when User Account Controls (UAC) is enabled.
o Fixed a problem that prevented a clean start of Windows Installer.
o Fixed a problem with starting Windows Live Messenger.
o Fixed a problem with use of some plug-and-play hardware such as webcams and joysticks.
* Fixes to Quick Recovery and Immediate Recovery:
o Correctly recover files that have a long name or a long path.
o Suspend Immediate Recovery notifications until the file is no longer in use by the application that created it.
o Improved support for Immediate Recovery with Google Chrome and Microsoft Office products.
* Many more fixes under a hood for a smoother Sandboxie experience.

Third-party software:
* Resolved conflict with eEye Blink (version 4.3.0 or later)
* Resolved conflict with Outpost Firewall during installation.

New Features:
* Full support for Windows 7.
* Improved support for User Account Control (UAC) elevation: Elevation requests are handled by the Sandboxie Start.exe program. (Windows Vista/7. Elevation from a standard user account is not supported at this time.)
* Improved support for WinSxS assemblies eliminates error 14001 for sandboxed programs, and makes it possible to install a wider range of software.
* Configuration Protection: Sandboxie configuration can be locked for Administrator-only access or with a password.
* A new "Run As UAC Administrator" option appears in the Run Any Program window and the right-click Run Sandboxed sandbox selection window. (Windows Vista/7.)
* Sandbox folders are created with a Sandboxie icon.
Fixes:
* Tightened protection to prevent actions by malicious programs such as closing windows outside the sandbox, changing the password for the logged-on user account, changing system parameters or colors, or initiating logoff sequence.
* SandboxieCrypto service takes only a few seconds to start, rather than a few minutes. (Windows Vista/7.)
* Alleviate need for all programs in the sandbox to run as Administrator when installing new software, thus permitting software to be installed directly from the browser, for example. (Typically applies to Windows Vista/7.)
* Color border appears even when the taskbar is hidden.
* Sandboxed progams have improved handling for arrival/removal of new drive letters.
* Improved support for sandboxed programs writing files into directory junctions and volume mount points.
* Improved access to hardware devices by sandboxed programs.
* Sandboxie AutoPlay cancellation when CD/DVD drives are forced honors the Disable Forced Programs mode.
* Fixed a problem when Sandboxie is installed to a folder with non-English characters in its name.
* Changed default delete sandbox command for Eraserl secure delete: Use -method DoD_E -resultsonerror rather than -method Gutmann -results.
* For a full list of changes, see topics and discussion in the Sandboxie Beta Version 3.39 forum.
Third-party software:
* Improved compatibility with Kaspersky Internet Security 2010, Norton Internet Security 2010 and ZoneAlarm Security Suite 9.
* Improved interoperability of Microsoft Outlook under Sandboxie and Windows Desktop Search outside Sandboxie.
* Improved support with some download manager software.