“restore to an earlier time when you bought it. Then stop the updates. period.”
You cannot stop Windows Updates on a Windows 10 Home PC, and may not be able to stop them on Win10 Pro, anymore. Saw something to that effect recently. Cheapest and easiest thing to do is update the driver for the WiFi adapter. That may fix it. You could also try changing the Wifi channels the modem and adapter use, or move your computer closer to the Modem. Poor signal strength can be the cause of Wifi problems, as can too many WiFi signals on the same channel you’re using. If not, try a different WiFi adapter. Preferably a different manufacturer if you go with the new adapter. And good luck!
There are some very good recommendations from Old Student here.
I myself would go with the Ethernet drop from the WiFi modem.