Under the heading of "just commenting" - I'll add:
The Java applet in the control panel will be the one for the 32bit version of Java (unless a 64bit version of Java is installed - then the applet will be from the 64bit installation). 64bit versions of Java do not check for updates and there is no tab named Update
on the 64bit Java control panel applet.
There is no way (that I know of) to start the 32bit version of the Java control panel applet with elevated privileges using Start menu > Control Panel > Java... and yet one needs the applet to run with elevated privileges in order to change/save the frequency that Java checks for updates. The work around is to use Windows (file) Explorer to get to the file named javacpl.exe - right click on that file and select "Run as administrator" from the context menu.