Something is hanging around my Windows 7 system that has messed up Java.  I cannot even run the "verify version" on the Java Web site.  When it runs it gets an application error:  "Class not found exception", jreverification.class   I've seen other similar problems, but this is the simplest way to demonstrate the problem.  I have removed all of Java that i can, ran JAVARA and jxpiinstall and that did not fix the problem.  perhaps there is something in the Java class path, but I don't know how to find that or perhaps there is a access privilege problem to fix.  I also searched this site for help.

I should note that firefox seems to be running well and there are lots of Java applets there, but this error or related errors still happen.

Any help anyone could give would be appreciated. Here is the console information that popped up when an error occurred.

Java Plug-in 10.7.2.11
Using JRE version 1.7.0_07-b11 Java HotSpot(TM) Client VM
User home directory = C:\Users\Me
----------------------------------------------------
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
q:   hide console
r:   reload policy configuration
s:   dump system and deployment properties
t:   dump thread list
v:   dump thread stack
x:   clear classloader cache
0-5: set trace level to
----------------------------------------------------
A severe infection will bust Java sometimes...what protection apps do you have...and when were your LAST scans ? ?I am using F-secure and it is always up-to-date with scheduled full scans of all my disks once a week. 

I am experiencing not other noticeable problems.  Other than these isolated Java errors which appear to be some obscure problem that Java can't find routines when it happens. OK, another clue found.  I looked up the environmental variables and found

 .;C:\Program Files (x86)\Java\jre6\lib\ext\QTJava.zip

which is wrong, since I do not have jre6 installed and there is no QTJava.zip file in the C: drive. Re-installed QuickTime and the environmental variable is not correct,  did not fix the problem. Quick Time has nothing to do with the java issues...
I suggest booting to safemode and run the latest java uninstaller...then DLoad and install the latest version.I understand what you are saying, but there was an incorrect QuickTime Java environmental variable.   It pointed to Java 6 and this machine does not have Java 6.  I have seen the failure when there is a video playing, so it was worth fixing. 

OK, re-install after safe-mode clean up, same problem.  I'm pretty sure that QTJava.zip does not actually refer to quicktime, but it's more likely a component of something else (such as the Qt framework/libraries) that was not uninstalled fully. Are you installing, uninstalling and running everything as administrator; are you experiencing this problem in other browsers; and how long has this been an issue?Many thanks for the help, however, It appears that QTjava.zip is clearly from QuickTime as it appeared when I reinstalled QuickTime.  Everything was removed and installed with the proper credentials.  The problem is consistent on both Firefox and IE.   I get exactly the same result.  The funny thing is it only happens for a few things like the Java website checking for Java and using one of the Mars lander simulators.  It has been going on for about 2 months or so. 

Well since re-installing java didn't do it then doing the same with QuickTime should be the next logical step...

Let us know,Reinstalled QuickTime, no change.  I did not expect it to change as the issue looked like my old QuickTime install pointed to Java6 which was replaced by Java7.   I think this is some obscure problem possibly with the registry and a Java pointer.  If anyone knows of a utility that can remove all Java references in the registry, I'd give it a try. You asked for it... http://www.java.com/en/download/help/manual_regedit.xml make sure to read the backup registry instruction first.Java Verify failure  unable to Configure Java Control Panel not opening ( Fix : )

Java Verify failure  unable to Configure Java Control Panel does not open ( Fix : )
this is a regular ( windows 7 bug related ) problem after successful installation of Java ( jre ) and fresh installation of Windows7 64bit or 32bit on my laptop or desktop.  what worked perfectly for me was setting  COMPATIBILITYMODE=WINDOWSNT  to make windows launch the JP2LAUNCHER.EXE  and  JAVAW.EXE  files properly.
jp2launcher.exe windowsNT compatibilty solves Java Verify failure problem at  https://www.java.com/en/download/installed.jsp   
javaw.exe windowsNT compatibilty solves unable to open or Configure Java Control Panel problem.

    *  SEARCH for JAVAW.EXE   inside  c:\program files   or  c:\program files (x86)
    *  right-click mouse on  JAVAW   application ICON logo
    *  click  PROPERTIES
    *  click  COMPATIBILITY
    *  tick the checkbox at COMPATIBILITY MODE
    *  choose  WINDOWS NT service pack
    *  click APPLY or click OK

Now, the Configure Java Control Panel will start opening and working.


    *  search for JP2LAUNCHER.EXE   inside  c:\program files   or  c:\program files (x86)
    *  right-click mouse on  JP2LAUNCHER
    *  click  PROPERTIES
    *  click  COMPATIBILITY
    *  tick the checkbox at COMPATIBILITY MODE
    *  choose  WINDOWS NT service pack
    *  click APPLY or click OK

Now, the Verify Java will be successful at  https://www.java.com/en/download/installed.jsp


if we find 2 or 3 versions of JP2LAUNCHER and JAVAW when we search, then we must repeat the above for all of them.


in the Configure Java Control Panel Advanced tab we can set "Do not check" certificate revocation and disable security verification.
and in the Security tab we may Edit Site List... for the Exception Site List  ( add URLs to  unblock sites )