I hate to tell this, but during testing the sandbox as described on this webpage http://www.sandboxie.com/index.php?TestingTheSandbox the complete folder "My Documents" on my Data Partition [D:] disappeared before my eyes when I clicked on this folder to open it. It was completely gone with all its subfolders. I had to mount an image on my external harddisk to recover it. I'm lucky I backup my data partition daily, so I didn't lose anything. Such behaviour is unacceptable. I can't trust Sandboxie anymore. I uninstalled it.