This may be old news, but I just came across this cool-sounding virtualization tool called Returnil. It's not processor-virtualization, but rather environment-virtualization. Using Returnil, you can install, move, delete, muck up anything you want on the system (provided it's on the C:\ drive), and when you reboot you are reset. Somewhat like System Restore, but faster, and more comprehensive. Unlike System Restore, it only supports one rollback and you can only revert by rebooting. You also can't seem to just commit your actions. To me, it looks like a great tool for installing a trialware app to see how things...