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.
OfferAgent is a typical adware spyware that can be installed to the computer as a part of certain ad-supported application. The adware serves undesirable pop-ups containing many commercial advertisements. OfferAgent runs on every Windows startup. Its files are located in the main computer folder C:Windows or C:Winnt.
Technical details (How to remove OfferAgent(pop up))