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.
TopSearch is an Internet Explorer toolbar with specialized search functions. TopSearch may display advertisements and may come bundled with some file-sharing applications, such as KaZaa and Grokster.
Technical details (How to remove TopSearch(pop up))