Changes

<install cmd='"%SOFTWARE%\cutewriter\CuteWriter.exe /verysilent"/VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-'/>

<upgrade cmd='"%SOFTWARE%\cutewriter\CuteWriter.exe /verysilent"/VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-'/>

<remove cmd='"%PROGRAMFILES%\Acro Software\CutePDF Writer\uninscpw.exe /verysilent"-s'/>

This remove command still shows Note that the option for a dialogue box silent uninstall is completely different (without the /verysilent flag, it shows two) - you'd need to use an AutoIt script s) from the option for a true silent uninstallinstall. Also don't forget to surround the complete path to the executable with quotes because the path contains spaces.  The software depends on Ghostscript in some form being installed on the machine; I used [[Ghostscript|GPL Ghostscript]].