Don't know why to complicate what it't easy. Just download opera installer and use Opera_964_en_Setup.exe /S /v"/qn CREATE_DESKTOP_ICON=1 CREATE_QUICKLAUNCH_ICON=1 CREATE_STARTMENU_ICONS=1 ALLUSERS=1" """"""""""""""""""""""""""""""""""""""""""""""quotes are the answer"""""""""""""""""""""""""""""" Could not find this simple solution anywhere... hopefully now I can give my contribute, hope it helps