And, since no registry "cleaner" has ever been demonstrated to do any
good (think of them like treating the flu with chicken soup - there's no
real medicinal value, but it sometimes provides a warming placebo
effect), I always tell people that the risks far out-weigh the
non-existent benefits.
I have to comment here.
A number of years ago, I read an article in Scientific American by some
medical scientists who devised a supportive diet for victims of cholera.
The problem with cholera is the disease causes loss of fluids and
electrolytes and interferes with regaining same. The supportive diet
consisted of a fluid with electrolytes and some protein and carbohydrate
content that could be fed to people to refresh those items, and enough
could be fed and retained that the patients could survive long enough for
the immune system to defeat the Vibrio cholerae.
The authors' punchline was that it was in fact a lot like your
grandmother's chicken soup, and that she was right.
The same substances would be helpful for flu victims, some of whom might
benefit from that kind of supportive therapy.
I still think that registry cleaners are snake oil, though