diff --git a/CLIENT_DATA/delsub32.ins b/CLIENT_DATA/delsub32.ins
index 94819be..019888e 100644
--- a/CLIENT_DATA/delsub32.ins
+++ b/CLIENT_DATA/delsub32.ins
@@ -39,10 +39,10 @@ comment "Delete program shortcuts"
 LinkFolder_uninstall
 
 [Winbatch_uninstall_old]
-"$UninstallProgramOld$" /S
+"$UninstallProgramOld$" /silent /norestart /SUPPRESSMSGBOXES /nocancel
 
 [Winbatch_uninstall]
-"$UninstallProgram$" /S
+"$UninstallProgram$" /silent /norestart /SUPPRESSMSGBOXES /nocancel
 
 [Files_uninstall]
 ; Example for recursively deleting the installation directory:
diff --git a/CLIENT_DATA/setup32.ins b/CLIENT_DATA/setup32.ins
index abca748..f61a997 100644
--- a/CLIENT_DATA/setup32.ins
+++ b/CLIENT_DATA/setup32.ins
@@ -76,7 +76,7 @@ else
 endif
 
 [Winbatch_install]
-"$InstallExe$" /silent
+"$InstallExe$" /sp- /silent /norestart /nocancel /SUPPRESSMSGBOXES
 
 [Files_install]
 ; copy the ini file to the InstallDir