Pre update bat file InvokingAnswered

in our previous product we have installed slick.ttf font in customer's machine ,when releasing our next version we need to replace the slick.ttf file here is the problem comes when triggering wyupdate it show like slick.ttf used by sytem.exe to uninstall this font we need to run a bat file before update? that will remove the font here how we will do that with  template? Please reply ASAP