Symantecs Common Client Application for Norton AntiVirus 2003, Norton Personal Firewall 2003, and Norton Internet Security 2003. This task is, effectively, the "master" task in these products as its role is to call the different program features of the above products. For example, if Auto-Protect and E-mail Scanning are enabled, then CCAPP makes sure that those programs are running. If CCAPP is disabled, then Auto-Protect and Email Scanning will not run.
Leave well alone this task is crucial to the proper working of your Norton 2003 security product.
I recommend turning off the Live Update feature in NAV03 (this uses the Generic Host service aka 'svchost.exe' and do a manual update once a week.
Sygate does not like you using Universal Plug and Play (for security reasons UPNP is WIDE OPEN) which MSN Messenger amongst others use. The IP address is actually your own 'rebounded', if you allow this service through you can see how easy it would be for someone to breach your security.
At the end of the day never trust M$ for anything regarding security. Use another chat client if you must use one at all.
PS. Sygate is an excellent product and imo probably the best software firewall available. Make sure you go through each appliaction in Tools | Applications | Advanced and UNTICK the act as Server act as Client and Allow ICMP. If you don't know what each service and application does then now is a good place to start learning.