Have you just downloaded a program you don't know and would like to try it without fear that it could modify your system or install malicious software? All you need to do is use Sandboxie Plus to start it in a virtual container, from which it won't be able to make any changes to your computer.
For installation and usage guide: fribby.net/sandboxie-plus/?lang=en
Official page: sandboxie-plus.com/
Free Download Sandboxie 32 (x86) or 64bit:
File
License terms
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.