Are the apps that promise to speed up my computer legit?

Episode 1267 (1:45:43)

Larry from Dover, DE

Larry has seen a TV ad for something called "PC Matic" to speed up and clean his computer. He's skeptical of it. Leo says Larry should be. It's snake oil, basically. They do work, but he doesn't have to pay to do it because the apps that come with Windows can do it. And modern operating systems don't really need to be tuned up anymore. It won't prevent him from getting a virus either. Microsoft's Windows Defender is good enough.