Nflight, maybe you can answer me something...

In toying around with the Administrative Tools on the Control Panel, one can see the Services. And inside it shows a bundle of services of Windows and other programs we got installed, many of them running and even set to run at startup.
They all got descriptions and stuff, but the descriptions can be somewhat cryptic to one who isn't familiar with the inner workings of Windows.

Do you know names for a few services that would be safe to stop? I'm seeing there the Windows Firewall service running, but I don't use Windows Firewall, I got Norton Internet Security. This could be a safe one to stop, no?