In reading the threads, I see that fs-isr is now a different program with revised features, (fd-isr rescue). Is FirstDefense similar to Sandboxie, etc. as relates to discarding changes? There are times I would like to try a program, but would rather not deal with a bad install or leftover files if I choose not keep it. Would fd-isr be better to use than a sandboxie program for this? I am a longtime user of Acronis TrueImage. I just purchased ver 11 but I am currently using ver 8. The new version has a try&decide feature. Is this similar functionality to fd-isr from the standpoint of restoring a machine after trialing new software? Thanks.