diff --git a/source/WinFormApp/Util.cs b/source/WinFormApp/Util.cs
index 3c8b044..f50dae6 100644
--- a/source/WinFormApp/Util.cs
+++ b/source/WinFormApp/Util.cs
@@ -7160,6 +7160,10 @@ At first I was happy to find your code that solved my problem, but I did not lik
             //extract one selected by index icon from a file.
             public static Icon IconFromFile(string Filename, IconSize Size, int Index)
             {
+
+                //case 3751
+                if (!File.Exists(Filename)) return null;
+
                 int IconCount = ExtractIconEx(Filename, -1, null, null, 0); //checks how many icons.
                 if (IconCount < Index) return null; // no icons was found.