Sandboxie is free with a nag screen after 30 days.Been using it since around version 1.7 .
Thanks for that, a good explanation on that link as to how it works as well.
Just out of interest, if you acquired both Power Shadow and Sandboxie at the same time (humour me here), which one would you install and run first, before you checked the other one?
Chicken and the egg isn't it.