-100 is also a successful exit code

packages/pdfcreator.xml

@@ -19,7 +19,10 @@
         <install cmd='%COMSPEC% /C sc start "Spooler" 1>NUL 2>NUL'>
             <exit code="any" />
         </install>
-        <install cmd='%SOFTWARE%\pdfcreator\%EXE_PATH% /LOADINF="%SOFTWARE%\pdfcreator\setup.inf" /NOCANCEL /VERYSILENT /NORESTART /SP-' />
+        <install cmd='%SOFTWARE%\pdfcreator\%EXE_PATH% /LOADINF="%SOFTWARE%\pdfcreator\setup.inf" /NOCANCEL /VERYSILENT /NORESTART /SP-' >
+          <exit code='0' />
+          <exit code='-100' />
+        </install>
         <install cmd='%COMSPEC% /C REG ADD "HKLM\SOFTWARE\PDFCreator\Program" /v "UpdateInterval" /t REG_SZ /d "0" /f' />
  
         <upgrade include='install' />