I do feel a bit foolish to have put up with their "Danger, Danger, Danger Will Robinson" tactics for a while until I spent the money to buy it and see what it would to to improve my laptop's performance. It did greatly improve the performance. My Dad was lamenting problems with his laptop so I told him I'd send him one of my three license keys. I just did a search on regservo and found all these SCARY reviews. But, I despite their annoying marketing, I have to say it worked for me so I am going to see what it does for my Dad. I'll make sure he has important stuff backed up before he installs it.