I'm aware that my own opinions don't always agree with everyone else's but these words could have come straight out of my own notes
Regular readers of my own rantings will know that I include registry cleaners in this area too.
At the end of the day of course people are free to choose what they want for their computer but my main concern is that these "applications of peripheral dubiousness" actually deflect attention away from what should be the major focus of PC management. So many people seem obsessed with improving "speed" without appreciating that the only "quick" thing likely to happen is infection unless they concentrate on the important areas first.