These are usually anti-spyware or security software applications that use various forms of deception and/or unethical means or show a history of negligent false positives to goad the end user to make a purchase.
In some cases these applications maybe downloaded with some form of unwanted software at which point the rogue application is offered to the customer as a way to remove the unwanted software.
Comment:
MyCleanerPc is a Rogue AntiSpyware which display false detections. There is no EULA , Privary policy and contact information posted in their site.
Screenshots:
My Recent History
Not detecting High risk Adwares like 180solutions/Zango.It also shows the false positive "Windows Media Exploit" (Tested with Win2K/XP).