--- /dev/null	2019-11-13 18:18:28.000000000 -0500
+++ new/src/jdk.incubator.jpackage/windows/classes/jdk/incubator/jpackage/internal/WindowsRegistry.java	2019-11-13 18:18:25.233047700 -0500
@@ -0,0 +1,135 @@
+/*
+ * Copyright (c) 2012, 2019, 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.incubator.jpackage.internal;
+
+import java.io.BufferedReader;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintStream;
+import java.util.ArrayList;
+import java.util.List;
+
+final class WindowsRegistry {
+
+    // Currently we only support HKEY_LOCAL_MACHINE. Native implementation will
+    // require support for additinal HKEY if needed.
+    private static final int HKEY_LOCAL_MACHINE = 1;
+
+    static {
+        System.loadLibrary("jpackage");
+    }
+
+    private WindowsRegistry() {}
+
+    /**
+     * Reads the registry value for DisableRealtimeMonitoring.
+     * @return true if DisableRealtimeMonitoring is set to 0x1,
+     *         false otherwise.
+     */
+    static final boolean readDisableRealtimeMonitoring() {
+        final String subKey = "Software\\Microsoft\\"
+                  + "Windows Defender\\Real-Time Protection";
+        final String value = "DisableRealtimeMonitoring";
+        int result = readDwordValue(HKEY_LOCAL_MACHINE, subKey, value, 0);
+        return (result == 1);
+    }
+
+    static final List<String> readExclusionsPaths() {
+        List<String> result = new ArrayList<>();
+        final String subKey = "Software\\Microsoft\\"
+                + "Windows Defender\\Exclusions\\Paths";
+        long lKey = openRegistryKey(HKEY_LOCAL_MACHINE, subKey);
+        if (lKey == 0) {
+            return result;
+        }
+
+        String valueName;
+        int index = 0;
+        do {
+            valueName = enumRegistryValue(lKey, index);
+            if (valueName != null) {
+                result.add(valueName);
+                index++;
+            }
+        } while (valueName != null);
+
+        closeRegistryKey(lKey);
+
+        return result;
+    }
+
+    /**
+     * Reads DWORD registry value.
+     *
+     * @param key one of HKEY predefine value
+     * @param subKey registry sub key
+     * @param value value to read
+     * @param defaultValue default value in case if subKey or value not found
+     *                     or any other errors occurred
+     * @return value's data only if it was read successfully, otherwise
+     *         defaultValue
+     */
+    private static native int readDwordValue(int key, String subKey,
+            String value, int defaultValue);
+
+    /**
+     * Open registry key.
+     *
+     * @param key one of HKEY predefine value
+     * @param subKey registry sub key
+     * @return native handle to open key
+     */
+    private static native long openRegistryKey(int key, String subKey);
+
+    /**
+     * Enumerates the values for registry key.
+     *
+     * @param lKey native handle to open key returned by openRegistryKey
+     * @param index index of value starting from 0. Increment until this
+     *              function returns NULL which means no more values.
+     * @return returns value or NULL if error or no more data
+     */
+    private static native String enumRegistryValue(long lKey, int index);
+
+    /**
+     * Close registry key.
+     *
+     * @param lKey native handle to open key returned by openRegistryKey
+     */
+    private static native void closeRegistryKey(long lKey);
+
+    /**
+     * Compares two Windows paths regardless case and if paths
+     * are short or long.
+     *
+     * @param path1 path to compare
+     * @param path2 path to compare
+     * @return true if paths point to same location
+     */
+    public static native boolean comparePaths(String path1, String path2);
+}