Users are unable to select/unselect the next-generation Java Plug-in from Java control panel. The error message is incorrect and misleading.

Tested Build: jre 7- b66 (promoted build)
       OS: x86- Vista, Windows 7, XP

Steps to reproduce:
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1) On the test system, make sure you don't have any browser session open/running.
2) Install promoted jre 7- b66.
3) Invoke Java control Panel and click 'Advanced' tab.
4) Try to enable the next-generation Java Plug-in option.

If you encounter "... Error- Java Plug-in - Unable to change Java Plug-in settings..."
then the issue is reproducible.

In fact, the error message is incorrect (as there is no browser is running on the system as checked in step #1 above):

"The next-generation Java Plug-in option cannot be changed at this time because one or more browsers are running. Please close all browser windows >before changing the next-generation Java Plug-in option"