Norton not keeping "Secure" status

Hi I am running Norton Internet security (2009 key which has been upgraded over the years to most current, Just checked) and I am having an issue with it on my Windows 7 Ultimate Pro machine. I leave the computer on 24/7 (aside from when I have to restart it, and recently I've noticed that it would give me an attention message in the task bar saying norton isn't "secure" (at rick, needs attention, whatever) I open Norton and it says that a scan hasn't been done in x amount of days. I know there is idle time for the machine to do them so why isn't it? today for instance I had to restart to allow my phone to connect to the computer (that's another annoyance I've yet to burst over) and when I did i figured since i had to I'd get norton back at green so i ran the updater and it updated definitions, still not green so I tried to run a quick scan and it basically froze ("in progress" was showing but the scan window wasn't progressing) so I stopped the scan but the in progress screen was still stuck on working, so I had to restart again after that I ran the quick scan again and it worked this time. now all is green (so far) but what is causing this and how can i fix it? any additional questions for me to help figure this out just ask

 

Thanks in advance,

Eugene