diff --git a/Contrib/Modern UI/System.nsh b/Contrib/Modern UI/System.nsh
index cb33de23..671719b0 100644
--- a/Contrib/Modern UI/System.nsh	
+++ b/Contrib/Modern UI/System.nsh	
@@ -258,6 +258,8 @@ Var MUI_TEMP2
 
 !macro MUI_ABORTWARNING
 
+  StrCmp $MUI_NOABORTWARNING "1" mui.quit
+
   !ifdef MUI_ABORTWARNING_TEXT
     MessageBox MB_YESNO|MB_ICONEXCLAMATION "${MUI_ABORTWARNING_TEXT}" IDYES mui.quit
   !else
@@ -1380,6 +1382,11 @@ Var MUI_TEMP2
     Var MUI_HWND
     !define MUI_VAR_HWND
   !endif
+  
+  !ifndef MUI_VAR_NOABORTWARNING
+    Var MUI_NOABORTWARNING
+    !define MUI_VAR_NOABORTWARNING
+  !endif
 
   !ifndef MUI_FINISHPAGE_NOAUTOCLOSE
     AutoCloseWindow true
@@ -1659,9 +1666,13 @@ Var MUI_TEMP2
     !endif
 
     !insertmacro MUI_FUNCTION_CUSTOM SHOW
-
+    
+    StrCpy $MUI_NOABORTWARNING "1"
+    
     !insertmacro MUI_INSTALLOPTIONS_SHOW_RETURN
     
+    StrCpy $MUI_NOABORTWARNING ""
+    
     GetDlgItem $MUI_TEMP1 $HWNDPARENT 1028
     ShowWindow $MUI_TEMP1 ${SW_NORMAL}
 
diff --git a/Contrib/Modern UI/ioSpecial.ini b/Contrib/Modern UI/ioSpecial.ini
index fd601a22..fe6b5f79 100644
--- a/Contrib/Modern UI/ioSpecial.ini	
+++ b/Contrib/Modern UI/ioSpecial.ini	
@@ -1,6 +1,7 @@
 [Settings]
 Rect=1044
 NumFields=3
+CancelEnabled=1
 [Field 1]
 Type=bitmap
 Left=0
diff --git a/Contrib/Modern UI/ioSpecial3.ini b/Contrib/Modern UI/ioSpecial3.ini
index 05ae8f72..823bc170 100644
--- a/Contrib/Modern UI/ioSpecial3.ini	
+++ b/Contrib/Modern UI/ioSpecial3.ini	
@@ -1,6 +1,7 @@
 [Settings]
 Rect=1044
 NumFields=3
+CancelEnabled=1
 [Field 1]
 Type=bitmap
 Left=0