This is going to sound odd, but I can reproduce the problem on-demand 100% of the time.

Got a new HP laptop on Boxing day.  It has a Realtek RTL8822CE 802.11AC wireless network card.

If I connect to the wifi (Bluecurve gateway) with this device only, then within 60 seconds the gateway drops completely.  

The WiFi Analyzer app on my phone shows that both my 2.4 and 5Ghz SSIDs are no longer visible, and any device connected to either goes offline  (including my wireless TV box for Bluecurve TV).   

If I disconnect the new laptop from the wifi,  the network comes back on it's own, and the 2 wifi networks are visible again. (during the outage, the white LED on top of the modem stays lit, solid, no blinking).

If I use an external USB wifi dongle I have and plug that into the laptop, it connects just fine, no problem.

I can make it all drop on demand as soon as I connect the laptop using the built-in wireless NIC.

Any ideas WTF is going on here?   How is this technically possible that a client can bring down the modem?

I called shaw, this appears in the logs at their end to be the "modem flapping", which just started shortly after I got the new laptop.   They are sending a tech next week, but it sounds like I could possibly fix it if I knew how a laptop wireless NIC card could bring down a modem.

The drivers for the internal NIC have been updated to latest available Windows 10 drivers.   

Any input would be welcome.