I recently came across a free program called '
Sandboxie'.
It runs a program in a sandbox, which is a closed environment so that the programs can't mess up your system. Much like a VM, but way less resource intensive and no need to install OSs, rebooting, and all other things you might need to do (I know it has some limitations compared to a real VM because of that of course).
I wonder if somebody has some experience with it, advantages, disadvantages, etc. Are there other alternatives (not talking about virtual machines, but about simple sandboxes)?