--- /dev/null	2018-10-22 10:52:10.000000000 -0400
+++ new/src/jdk.packager/windows/classes/jdk/packager/internal/windows/WindowsDefender.java	2018-10-22 10:52:07.909138100 -0400
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.packager.internal.windows;
+
+import jdk.packager.internal.Platform;
+import java.util.List;
+
+public final class WindowsDefender {
+
+    private WindowsDefender() {}
+
+    public static final boolean isThereAPotentialWindowsDefenderIssue() {
+        boolean result = false;
+
+        if (Platform.getPlatform() == Platform.WINDOWS &&
+            Platform.getMajorVersion() == 10) {
+
+            // If DisableRealtimeMonitoring is not enabled then there
+            // may be a problem.
+            if (!WindowsRegistry.readDisableRealtimeMonitoring() &&
+                !isTempDirectoryInExclusionPath()) {
+                result = true;
+            }
+        }
+
+        return result;
+    }
+
+    private static boolean isTempDirectoryInExclusionPath() {
+        boolean result = false;
+        // If the user temp directory is not found in the exclusion
+        // list then there may be a problem.
+        List<String> paths = WindowsRegistry.readExclusionsPaths();
+        String tempDirectory = getUserTempDirectory();
+
+        for (String s : paths) {
+            if (s.equals(tempDirectory)) {
+                result = true;
+                break;
+            }
+        }
+
+        return result;
+    }
+
+    public static final String getUserTempDirectory() {
+        String tempDirectory = System.getProperty("java.io.tmpdir");
+        return tempDirectory;
+    }
+}