Been reading about these two products, at the co. site and here as well. I seem to recall reading in one post, that in comparing these two programs, there's a major shortcoming in Roll Back, vs FD-ISR? Major, in the sense, that there was a key difference possibly in what Roll Back CAN NOT DO vs. a fuller approach of FD-ISR, I take it? Roll Back sounds slick/lightweight, & intriguing; but, I don't want to go down the wrong path and think a program has made our PC "bulletproof" as it were and then find out too late that I should've bought the other program instead. Have XP PRO SP2, about 50 GB free on C drive. Am pretty good about backups, with standard programs, and I think the co. says that this is a good practice even if using their flagship product. I do also have PG, and I think the co. mentions how that may "mess a bit" with FD-ISR? Tho' I think if one disables PG, that helps FD-ISR do its work?