OneClickDownload is an adware that allows you to easily download torrents from sites such as ThePirateBay. The author of this program has claimed to "have 10 million downloads from various users". This is promoted through hacked sites that use exploits to install this program onto your computer without your permission. Once installed is it will display false error messages and security warnings on the infected computer.
Many users of 1ClickDownloader have stated that it will do a fake scan on your computer that will say that there are numerous infections or problems present. It will then prompt you to remove these so-called infections or problems, but will not allow you to do so unless you first purchase the program. However, no evidence of this was proven of this myth.