I have a problem with Java. I recently tried to update to Java 6 update 16. This failed - Error 25099 unzipping core file failed. Clicked on the error code ion Java and was given 2 methods of 'Workaround'. Both first required me to uninstall Java from Control Panel - Add/Remove Programmes, which I did. The Workaround did not work - I did not have the line present that they told me to delete. There is now a different Workaround delete all files on - C:\Program Files\Java\jre6\ . I hesitate to do this after my first experience. If I do a search it produces a whole list of Java 6 - but otherwise there is no trace of Java on my System (no coffee cup logos etc anywhere and Java says I do not have it on my system). I have tried your solution - cleaned registry etc - use Regcure and CCleaner - no luck. Does the problem stem from IE8? I have 2 hard drives. I upgraded Java to 6. 16 on the other little used drive, which I had not upgraded to IE8, without a problem.