never be too hasty in upgrading one's PC
Many Java applications work best, or even at all, with one particular version of Java. It's hardly rare to have to have several versions on your machine at once, each one tied to a different application.
Letting it upgrade itself automatically, thus rendering one (chosen at random) of your business critical applications useless
is utterly mad.
I can't however be
too rude about Java, just in case the people who pay me to write the stuff are reading this.