Do you happen to have Cox as you provider and if so do you have one of their Netgear gateways (dual modem/wifi router)? If so that may be the problem. Apparently they sent out a faulty firmware update in the last couple of days that is causing problems. Oops. Fortunately I use the Motorola and they haven't screwed that one up, yet.And the other issue seems to be Chrome. I switched over to Edge, and other than a little slower than usual, I don't have any of the crazy cursor issues.
Guess it's time to uninstall and reinstall Chrome, for the 2nd time this year, or else dump it entirely.