Update: Further exploration suggests that 1) this was glitch that arose when the (now mystery) update occurred, or 2) and more likely, something in the Toshiba connections. The machine has 3 usb...

Update: More bizarre the closer I look. I just checked my Update History in System Settings and the last entry is for an update on 07/22, but yesterday 07/29, before I turned notifications off, I...

My computer appears to have undergone an automatic Windows 10 update on 07/29. Immediately afterward, odd stuff started happening:
1) the notification message for the USB port that will charge...