I have downloaded JDK 1.6 for test and learning. But when I wanted to uninstall JDK 1.5, I met a problem. I was told that "You already have this version of the JDK installed. Please uninstall the product through your add/remove programs utility before reinstalling.". But I clicked the remove button. Who knows how to solve this problem? I want to uninstall the JDK 1.5 and install JDK 1.6. Thanks for help.