True - but does this really matter ? Say - Browser is only 99% secure on any given day Say - Probability of being attacked is x% on any given day Say - Probability of Returnil not being able to restore clean system is y% Say - Probability of Shadow Protect not being able to restore a clean system is z% Perhaps someone here can work out the probability that only using a 99% safe browser + returnil and imaging will lead to disaster ? I'm not going to worry too much about less than perfect security. For me the extra percentage of security that Sandboxie adds can hardly be measured. On my old machines the lag on first launch is however noticeable.