Not all applications are great about filling out all the columns in Autoruns. If an entry does not include a description and publisher, go to the last field in the list and find out which directory it’s running from. You can then deduce what the service does.
Again, be cautious. The worst thing that could happen is that you’d need to boot Vista from a CD or DVD, mount a Recovery Environment, and go back to your created Restore Point. For less drastic problems, you can go back to your Restore Point with Vista running.
Once you’ve used Autoruns to stop services that you absolutely don’t need and have verified this by rebooting and trying out several applications, going online and browsing Bright Hub, and maybe sending an email, it’s time to look at easing the startup load of applications that do load.