Java Runtime Environment Update

I have been attempting to install the JRE update and each time I try I get “Error 1722. There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor.” I have attempted the solutions suggested in the Java material, but have not been able to get the Setup Type dialag box featured on their page. I wonder if you people have any suggestions as to how I can install this update. At the moment there are a couple of programs that I wish to use that require the JRE to function properly. Any assistance will be greatly appreciated. Please note that Sun states “The exact reason for this error is not known at this time.”