A few days ago, I couldn't get into the internet. This popped up as the problem. I had never experienced this problem before and didn't even know what it was.
With the help of a friend's laptop, we were able to fix the problem.
I never did find out what causes it other than the 'help' page telling me "It happens"
I did turn it off and on: nothing.
Without my friends laptop, we would never have fixed it; it was a little complicated with 5 or 6 things to correct the problem.
I am anything but a pro. Turning it off and on was the best I could do without instructions!