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whenever I click on java control panel, nothing happens. I did

C:\Windows\System32>control java.cpl

still nothing happens. I installed Java 6 update 24(the latest update), did not help. how do I fix this problem?

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Do the symptoms continue if you try with a different user? –  Windos Aug 13 '11 at 1:01

3 Answers 3

I once also had this problem with the exact symptoms.

The only operations that helped was to remove it using the Add/Remove software applet, reboot, delete the folder C:\Program Files\Java and then install it again.

This fixed it for me.

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Try opening "C:\Program Files\Java\jre6\bin\javacpl.exe" from an elevated command prompt (i.e. run as administrator.)

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surprise, nothing happened, no error messages, nothing, nada –  user157195 Aug 13 '11 at 0:04
    
@user157195, do you have any javaw.exe processes showing up in Task Manager? –  Windos Aug 13 '11 at 0:08
    
yes I have a few javaw.exe processes, they belong to other java procesess(netbean etc). opening javacpl does not change the count. –  user157195 Aug 13 '11 at 0:50

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 )

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