INTRODUCTION TO SANDBOXIE

Sandboxie is a proprietary sandbox-based isolation program developed by Ronen Tzur, for 32-bit Windows NT-based operating systems.[1][4][5] It creates a sandbox-like isolated operating environment in which applications can be run or installed without permanently modifying the local or mapped drive.[1][6]An isolated virtual environment allows controlled testing of untrusted programs and web surfing. [6][7][8]

Version 3.36 of Sandboxie added partial 32 bit Windows 7 compatibility, for build 7000. Version 3.38 adds additional Windows 7 support, for build 7100. Version 3.40 adds full support for Windows 7, as well as security improvements and minor fixes.

64 Bit Windows
Sandboxie is no longer developed for 64-bit editions of Windows XP, and the developer has no plans to support future 64 bit Windows versions.[1] In the past, Sandboxie was usable on 64 bit editions of Windows XP, provided that the user bypassed Patchguard. However, an updated and revised Patchguard included in hotfix "KB932596" makes this impossible.[2] Although uninstalling the hotfix will allow a user to run an older 64 bit version of Sandboxie as before, doing so could expose the kernel to unauthorized modifications.


Source:
http://en.wikipedia.org/wiki/Sandboxie