Look at the popularity of sandboxing and virtual system type softwares and how they have taken off. Many, if not most are even free. There are many commercial imaging type backup softwares available. It seems to me that you even have to jump through hoops to purchase rollbacks. The EAZ-FIX site is a perfect example, and I can't say I've ever even noticed any offered on sites like MajorGeeks, which posts commercial and free offerings. Also, the few I'm aware of are all commercial softwares. Why so few, are they difficult to build or what? Thank You!