Programs that are running on my Computer

Below is a list of Programs that show when I press ctrl alt del. I need to know what is good, what is bad and how do I get rid of the ones that should not be there:

SmartUI
Explorer
Microsoft Office Shortcut Bar
Zlclient
Navapw32
Pplinks
Winadserve
Brmfrsmg
Systray
Gnetmous
Winadslave