This is a really excellent and well thought out tool...all the changes it makes can be reversed from within the programme so there is no need to worry about usingit and no need to set a restore point before doing so either...it does have an FAQ and the developer is at pains to tell users not to blindly enable all settings...doing so will make ones computer rather a pain. If one were to block activeX from IE then one would not be able to use Microsoft updates for instance. Treated and used sensibly this tool is a boon.