Why does my router and PC need to be rebooted - Cable Modem connection fine

I have the following

Linksys DOCSIS 3.0 Cable Modem (DPC3008-CC)
TRENDnet AC1750 Dual Band Wireless Router (TEW-812DRU)
Desktop PC
Laptop PC
Multiple Wireless IP cameras
Norton Security Suite

My network infrastructure has been fine until this past month.  Twice the following has occurred.  I get an icon flash "No Network Connection" for all my clients (Desktop PC, Cameras, etc.)  
I call Comcast and the connection is fine.  
I unplug the ethernet that runs from the modem to the router
I unplug from the router the ethernet cord that runs from my desktop to the router
I plug the ethernet cord into the cable modem from my desktop

My desktop then works (I have an internet connection) and proves out there is nothing wrong with the internet signal coming from Comcast.

The way I corrected the issue both times was to shut down my PC.  Plug the cord into the original connections and I then Reboot the modem and router.  I then turn on the PC and magically I have a connection.  However, I have to do this several times.  

My fear now is this happen again in several more weeks...Any ideas on what is going on....