Adware:Adware (or spyware) is a small program that is designed to show advertisements (in various form and degrees of intrusiveness) on your computer. It often reports personal information back to its owners. As a result your sense of privacy can be violated.
PayPopup is a spyware cookie. Tracks your personal information and browsing habits as you surf the web. Information can be retrieved by the parent company.
www.paypopup.com
Technical details (How to remove paypopup(pop up))