The moral of the story is: Disable Java for your browser, you probably (really) don’t need it.
For your computer at work – of course – please check with your admin(s) before attempting any changes.
If you’re running Mac OS X 10.7 or newer and keep up to date, disabling Java in your browser was probably taken care of for you.
Additionally, you can ensure Java is disabled in Safari, by navigating (while in Safari) to the Preferences menu, Security tab.
In Chrome, type: chrome:plugins and check that Java is disabled.
In Firefox go to Tools > Addons > Plugins
If you’re running Windows, please be sure to follow these instructions: