Hello, i'm from Italia and excuse me for my bad english! I need to try large softwares like the fantastic Adobe Master collection CS6 and the new version of Cinema4D, but i don't want that remain any trace of the installations!...to avoid problems with future installations. For this purpose i prefer a light virtualization software instead a VM, because the VM is more uncomfortable and requires too many hardware resources! After much researches i realized that the best light virtualization programs are: 1) Returnil virtual system 2) Shadow Defender 3) Toolwiz time freeze which do you think is the most suitable for testing programs and especially which of them is most "hermetic"??, Of course I will never use these programs to try viruses or suspicious files!! Thank.