CCleaner has become an almost regular program on Windows computers. Everyone uses it, cleans the computer regularly, and thinks that it speeds it up that way. But is that really so? If you use it as an average user, with default settings, it will only slow down your computer. How come he slows down? It's simple, CCleaner deletes files that actually speed up your computer. For example, it deletes temp files that serve to speed up your internet surfing. This is where the browser saves the data, so the next time you visit a site, the browser reads the already cached data from the HDD, it doesn't have to download it again from the internet. What's more, it deletes site cookies and other information such as autofill, so you may lose some saved auto-fill data in the browser. Only the "Empty recycle bin" option can help, but you don't need additional software.