diff --git a/src/ibcalpha/ibc/IbcTws.java b/src/ibcalpha/ibc/IbcTws.java
index 6f46bf2..6c56337 100644
--- a/src/ibcalpha/ibc/IbcTws.java
+++ b/src/ibcalpha/ibc/IbcTws.java
@@ -332,6 +332,7 @@ private static List<WindowHandler> createWindowHandlers() {
         windowHandlers.add(new ExitConfirmationDialogHandler());
         windowHandlers.add(new TradingLoginHandoffDialogHandler());
         windowHandlers.add(new LoginFailedDialogHandler());
+        windowHandlers.add(new UnrecognizedUsernameOrPasswordDialogHandler());
         windowHandlers.add(new TooManyFailedLoginAttemptsDialogHandler());
         windowHandlers.add(new ShutdownProgressDialogHandler());
         windowHandlers.add(new BidAskLastSizeDisplayUpdateDialogHandler());
diff --git a/src/ibcalpha/ibc/UnrecognizedUsernameOrPasswordDialogHandler.java b/src/ibcalpha/ibc/UnrecognizedUsernameOrPasswordDialogHandler.java
new file mode 100644
index 0000000..5d941d3
--- /dev/null
+++ b/src/ibcalpha/ibc/UnrecognizedUsernameOrPasswordDialogHandler.java
@@ -0,0 +1,55 @@
+// This file is part of IBC.
+// Copyright (C) 2004 Steven M. Kearns (skearns23@yahoo.com )
+// Copyright (C) 2004 - 2020 Richard L King (rlking@aultan.com)
+// For conditions of distribution and use, see copyright notice in COPYING.txt
+
+// IBC is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// IBC 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 for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with IBC.  If not, see <http://www.gnu.org/licenses/>.
+
+package ibcalpha.ibc;
+
+import java.awt.Window;
+import java.awt.event.WindowEvent;
+import javax.swing.JDialog;
+
+public class UnrecognizedUsernameOrPasswordDialogHandler implements WindowHandler {
+    final String DIALOG_TITLE = "Unrecognized Username or Password";
+
+    @Override
+    public boolean filterEvent(Window window, int eventId) {
+        switch (eventId) {
+            case WindowEvent.WINDOW_OPENED:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    @Override
+    public void handleWindow(Window window, int eventID) {
+        Utils.logToConsole("Unrecognized Username or Password");
+        Utils.logToConsole("Cold restart in progress");
+        MyCachedThreadPool.getInstance().execute(new StopTask(null, true, "Cold restart after Unrecognized Username or Password dialog encountered"));
+
+        if (! SwingUtils.clickButton(window, "OK")) {
+            Utils.logError("could not dismiss Unrecognized Username or Password dialog because we could not find the OK button");
+        }
+    }
+
+    @Override
+    public boolean recogniseWindow(Window window) {
+        if (! (window instanceof JDialog)) return false;
+
+        return (SwingUtils.titleContains(window, DIALOG_TITLE));
+    }
+}