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.
ZServ is a variant of the VX2/Transponder parasite. ZServ installs on your computer without user consent, and will launch a large number of extremely annoying popup adverts. ZServ loads as a Browser Helper Object everytime you open a web browser, and may create system instability as well.
Technical details (How to remove Transponder.Zserv(pop up))