Well, I run a small side business fixing computers. I have ran those tools on many many computers and never had anything happen. I dont see why they say that. All its going to do is scan your pc and if nothing is there, then it can do anything. Simple as that. Sometimes they tell you to run those programs and it wont find anything so whats the difference? The same thing with msconfig startup entries. They tell you not to disable them or remove them, I dont know why but to this day, I ve never ever had an issue with doing that. So its up to you on what you want to do.