ISSUE:

After a few months of better than 0 to 300 Mbps - sometimes even reaching 75 - 80 Mbps, the modem decided it was time for a reboot. I did not execute the reboot. Though a execution of a modem sounded like a good idea. After the modem settled down - no internet. No cable or wi-fi. I checked with 3 machines, 3 operating systems an still nothing.

I did the disconnect pwr and cable to refresh it - still no Internet.

Lastly, I did the factory reset. Voila! Internet

That lasted about 2 hours when it rebooted again. Again, end result was I factory reset (FR) again. 

Each time after FR, I had to reset the password to mine, and change the settings to a more semi-private setup.

Shaw has sent 2 more modems, and same thing happens. Middle of doing something and modem reboots, needing factory reset. Each modem is the magical self-activating. I have a feeling It is having a bad week as well and customers are still beta testers.

START SIDEBAR::: I wish Shaw would put as much effort into maintaining something other than the very reliable billing system and get rid of the &^$%# "Authentication Failed" popups that keeps re-drawing this screen with the &^&% NOTICE every few seconds! It's almost as bad as having to Factory Reset every few hours.
END SIDEBAR:::

Back to the issue. 

TESTING:

Testing, I used 3 different desktops, 5 O/Ss to try Internet. None could connect. But, each could see the other on the local net, but not talk to each other.  (Win 7, Win 10, Ubuntu, Mint, Pop_OS) 

'Support' says it's my computers. NOT. The modem keeps resetting - computers are not involved. 
This same thing started happening with TCV many years ago. After 18 years of TV with Shaw, they finally, after 3 months of grief, agreed that they could no longer provide the signal. I'm without TV. But that doesn't help with this very new issue.

About 20 years ago, a signal drop and complaints and 3 months later, they discovered a break in the cable between pole and house. A good wind would sway cable, breaking connection and back again.  Can't be that, because the landline with Shaw doesn't reset - just the modem.

Specs:

Hitron
Shaw installed splitter for Internet and Phone. Tight.
After second modem, I replaced all cables.
Time of reboots are random. 
Normally only have one desktop connected to the Hitron at any one time - no WiFi used.

Main system:
Win 7 cabled desktop is usually the only one connected.

Ideas?

~w~