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.
DeskAd Service is an adware program that may generate popup and popunder advertisements on your computer screen. DeskAd Service may hijack Internet browser and direct to unsolicited websites. DeskAd Service is reported to be a variant of Adware.Winupdates.
Technical details (How to remove DeskAd Service(pop up))