Try turning it off as I explained.. And if you're still having problems, then simply try updating to the newest version manually using the instructions in the link below.. (A number of folks on the forum are having difficulties when trying to update using the "online" java updater.. Instead, manually download the full "OFFline" installer.. Once the installer is on your desktop, then simply uninstall all previous versions of Java from the Control Panel/Add-Remove Programs section, then install the new one..
Click on the link to Sun's Java below, then click on the "Download" button next to "Java Runtime Environment (JRE) 5.0 Update 9". At the next page, accept/agree to the license, then download the full ''Windows Offline Installation'' file to your desktop,(about 15 MB), scan it with your antivirus (just to be sure it's clean). Once that's done, if you've already got a Sun Java version on the computer, open the Control Panel, double click on the ''Add/Remove Programs'' section, then uninstall all previous version of the J2SE Java listed there. Once that's done, then install Java 1.5 from the downloaded installer.
http://java.sun.com/j2se/1.5.0/download.jsp
After the new version of Java is installed, visit the Control Panel-Java icon again and UNCHECK the box in the "Update" tab.
Hope this helps.
Grif