from the doc : "zSearch is a search utility that provides automatic, real-time results directly to your toolbar. zSearch is so convenient, just type in your search in the toolbar or on a search site. zSearch allows you to be one click away from other relevant listings without leaving the page you are viewing."
Adware/zSearch [Panda]
Program Fileszsearchzuninstaller.exezstb.exe
zsearch.dll