Chrome webpages and other 3rd party app not loading on Nighthawk R7960

Firmware is : V1.4.2.84_1.3.42

Using an Arris Model SVG2482AC as the modem for Comcast. 

I do use Armor but not parental controls.

All my TVs are on Roku and they work fine. My IPad works fine and Chrome seems to work OK on the IPad. My android and apple phones don't seem to have an issue using Chrome.

I am the only person that uses a Windows 10 machine on this network. But have an old Windows 10 laptop and it looks to be doing the same thing. This machine does not have all the Windows 10 updates since I haven't used it in a while and it doesn't have MalwareBytes.

Sometimes I get the message "this site can't be reached". Check for typo. Then page loads after a few seconds. Other times I have to hit reload several times to get it to load. Right now, trying to log into Morningstar and got the message, then tried to load log-in page, which is just a blank white page. Really seems to give me issues with subscriptions sites that I have to log into.

The third party Fidelity app is also subscription requiring a log in. With that, the app will open but data is blocked from loading into the app.

I use this same setup (router/modem) at a second home and had no issues using that system over a week ago. But since I returned home over the last week, this has been an issue.  Just assumed this was a router issue, though it could be the modem, since my hotspot seems to work. This Nighthawk was sent to me by Netgear a few months ago because my last one would not update the firmware.