[dba-Tech] Sygate Personal Firewall

I grabbed the free version and have been using it the last couple of days.
Every once in a while a popup appears saying something to the effect of
"Application NTOSkernel has tried to access the network (internet?) and has
been blocked." What's this about? Should I worry? Should I be relieved?
Other than this message, nothing appears broken. I can see the network and
the internet, and everything like IE and Outlook seems to work fine.

Arthur