My opinion is that Sandboxie is a great, if not one of the best security apps ever.
Less than half a meg download, around a meg installed, using minimal resources and exceptionally secure.
Sandboxie at default settings is highly secure and the below banter may seem a bit tedious but after using SB for a while and getting used to how it works it sorta becomes second nature.
Sandboxie - Getting Started Sanboxie FAQ'sI have the registered version which allows me to create multiple sandboxes but I only usually use two.
The default sandbox is set so that only Firefox, Windows mail and WMP can run with only FF and Windows Mail being the only apps that can use internet resources.
In other words any sandbox can be set so only certain apps can run and only some or all of those apps can connect to the net.
I have a "Test" sandbox where I install all tpes of malware and rogue apps that I may want to check out as these simply cannot run in the default box as it's set for only certain apps.
Delete the contents of the Test sandbox and not a skerrick remains.
Control Your Sandbox