I am always very careful about making changes in my computers. From past experiences, I know that much mischief can be caused by injudicious updating and general mucking about with the workings of your system.
My philsophy is of the "if it ain't broke, don't fix it style" but, if you are determined that you need the latest versions of software, drivers etc, visit here on a regular basis and you will find out about most of the popular stuff at least. You can then decide what and if you want to load it.
Letting some program do this on is own is tantamount to opening up your computer to the world - and all that that entails.