NIS 2013 is Disabled at Windows Startup

Okay, what did I do this time?  :smileylol:

 

Over the last few days I started noticing that when I restart Windows 7 x64, NIS 2013 appears to be disabled. I say that because the system tray icon shows the white 'X' on the red ball. This condition lasts for about 10 seconds. Then the tray icon changes back to the familiar white check mark on a green ball and I know everything is okay.

 

Is this the expected behavior, or the sign of a problem? Is my PC protected by NIS when it is restarted?