What is it?

NSCSrvce.exe is associated with the Norton Internet Security Suite application.

What does it do?

Norton Internet Security software; it's your firewall and antivirus protection, needed to protect against all those nasties.

More info:

Read more about Norton internet security software [url=http://www.symantec.com/home_homeoffice/products/internet_security/index.html]@ semantec.com[/url]