Question : Windows XP client/Java Security "Password Needed-Networking"  popup

When users are in IE and go to an internal web page that hosts our Helpdesk system, a Java security popup is prompting to User Name and Password.  I have also recreated this security popup when opening up a Jet Direct card in IE.

My Sun Java Console shows the following:


Java(TM) Plug-in: Version 1.4.2
Using JRE version 1.4.2 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\
Proxy Configuration: Manual Configuration
 
 
----------------------------------------------------
c:   clear console window
f:   finalize objects on finalization queue
g:   garbage collect
h:   display this help message
l:   dump classloader list
m:   print memory usage
o:   trigger logging
p:   reload proxy configuration
q:   hide console
r:   reload policy configuration
s:   dump system properties
t:   dump thread list
v:   dump thread stack
x:   clear classloader cache
0-5: set trace level to
----------------------------------------------------
java.io.IOException: Server returned HTTP response code: 407 for URL: http://spellchecker.innovate.com/Spellchecker/SpellCheckApplet.jar
      at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
      at sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
      at sun.plugin.net.protocol.http.HttpUtils.followRedirects(Unknown Source)
      at sun.plugin.cache.CachedJarLoader.isUpToDate(Unknown Source)
      at sun.plugin.cache.CachedJarLoader.loadFromCache(Unknown Source)
      at sun.plugin.cache.CachedJarLoader.load(Unknown Source)
      at sun.plugin.cache.JarCache.get(Unknown Source)
      at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(Unknown Source)
      at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source)
      at sun.misc.URLClassPath$JarLoader.getJarFile(Unknown Source)
      at sun.misc.URLClassPath$JarLoader.t>(Unknown Source)
      at sun.misc.URLClassPath$3.run(Unknown Source)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.misc.URLClassPath.getLoader(Unknown Source)
      at sun.misc.URLClassPath.getLoader(Unknown Source)
      at sun.misc.URLClassPath.getResource(Unknown Source)
      at java.net.URLClassLoader$1.run(Unknown Source)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(Unknown Source)
      at sun.applet.AppletClassLoader.findClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at sun.applet.AppletClassLoader.loadClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at sun.applet.AppletClassLoader.loadCode(Unknown Source)
      at sun.applet.AppletPanel.createApplet(Unknown Source)
      at sun.plugin.AppletViewer.createApplet(Unknown Source)
      at sun.applet.AppletPanel.runLoader(Unknown Source)
      at sun.applet.AppletPanel.run(Unknown Source)
      at java.lang.Thread.run(Unknown Source)
load: class SpellCheckApplet.class not found.
java.lang.ClassNotFoundException: SpellCheckApplet.class
      at sun.applet.AppletClassLoader.findClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at sun.applet.AppletClassLoader.loadClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at sun.applet.AppletClassLoader.loadCode(Unknown Source)
      at sun.applet.AppletPanel.createApplet(Unknown Source)
      at sun.plugin.AppletViewer.createApplet(Unknown Source)
      at sun.applet.AppletPanel.runLoader(Unknown Source)
      at sun.applet.AppletPanel.run(Unknown Source)
      at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed.
      at sun.applet.AppletClassLoader.getBytes(Unknown Source)
      at sun.applet.AppletClassLoader.access$100(Unknown Source)
      at sun.applet.AppletClassLoader$1.run(Unknown Source)
      at java.security.AccessController.doPrivileged(Native Method)
      ... 10 more

The Java popup shows:
Heading=Password Needed-Networking
Firewal:  Unknown Site
Realm: ntlm
Scheme:
Username:
Password:

Clicking the X repeatedly in the top right corner will eventually get rid of the popup.

How do I make it go away for good?

Thanks

Answer : Windows XP client/Java Security "Password Needed-Networking"  popup

I recently had this same problem.  After trying numerous settings changes with IE and the Java control panel, the resolution was to uninstall the Sun version and to install the latest Microsoft version of Java.  This resulted in the applets loading and the Networking Password popup not appearing.