if it says its still running it either re ran its execution on its own after u stopped it OR you missed it ..... possibly it is renamed or whatnot but it is still there running suggestion ....... close anything u know ur not using ...... and then uninstall that mirc ....... then reboot ....... aside from that there are other posts here that give a better detailed way of removing this ..... click search ...... look for virus or trojans expland it to about one month in the search one would be located
HERE another would be
HERE hope that help alil