diff --git a/Source/exehead/Ui.c b/Source/exehead/Ui.c
index a88672e6..cc5c6660 100644
--- a/Source/exehead/Ui.c
+++ b/Source/exehead/Ui.c
@@ -1236,18 +1236,19 @@ static void FORCE_INLINE NSISCALL RefreshComponents(HWND hwTree, HTREEITEM *item
     TreeView_SetItem(hwTree, &item);
   }
 
-  // workaround for bug #1397031
+  // workaround for bug #1397031 A.K.A #434
   //
-  // windows 95 doesn't erase the background of the state image
-  // before it draws a new one. because of this parts of the old
+  // Windows 95 & NT4 doesn't erase the background of the state image
+  // before it draws a new one. Because of this parts of the old
   // state image will show where the new state image is masked.
   //
-  // to solve this, the following line forces the background to
-  // be erased. sadly, this redraws the entire control. it might
+  // To solve this, the following line forces the background to
+  // be erased. sadly, this redraws the entire control. It might
   // be a good idea to figure out where the state images are and
   // redraw only those.
 
-  InvalidateRect(hwTree, NULL, TRUE);
+  if (IsWin95NT4()) // Checking for < IE4 is probably better but more work
+    InvalidateRect(hwTree, NULL, TRUE);
 }
 
 int NSISCALL TreeGetSelectedSection(HWND tree, BOOL mouse)
diff --git a/Source/exehead/util.h b/Source/exehead/util.h
index b8b3696a..51f272d2 100644
--- a/Source/exehead/util.h
+++ b/Source/exehead/util.h
@@ -69,6 +69,7 @@ void NSISCALL myRegGetStr(HKEY root, const TCHAR *sub, const TCHAR *name, TCHAR
 
 
 extern DWORD g_WinVer; // GetVersion()
+#define IsWin95NT4() ( sizeof(void*) == 4 && LOBYTE(g_WinVer) == 0x04 )
 #define NSIS_WINVER_WOW64FLAG ( sizeof(void*) > 4 ? ( 0 ) : ( 0x40000000 ) )
 #define IsWow64() ( sizeof(void*) > 4 ? ( FALSE ) : ( g_WinVer & NSIS_WINVER_WOW64FLAG ) )
 #define SystemSupportsAltRegView() ( sizeof(void*) > 4 ? ( TRUE ) : ( IsWow64() ) )