Well, don't try software update it will destroy your system. Installing official Combo update will do prey much the same. However, a clever guy came up with a solution which allows you to backup existing kext's install combo update and then (without restarting) install necessary fixes. It's really cool that you can just restore some critical modules if you're not sure if new versions will work.

Warning, this seems to be Intel only. No idea if it will work for AMD.

Check out this tutorial and the related forum thread.