ZCast.exe
(NetZero)
ZCAST and CHKRAS are two background processes installed by the NetZero software. NetZero is the largest free ISP in the US. In return for free Internet Access with NetZero, you are required to view advertisements while online. This is done by means of the NetZero banner advertising window. ZCAST and CHKRAS ensure that that window is always showing. If it is not, because you terminated it through terminating CHKRAS, the window is restarted by ZCAST. CHKRAS also in turn checks that ZCAST is running if you closed ZCAST, CHKRAS restarts it !