I have powered down and powered back up about 20 times. I have no cursor showing. I have tried to reboot to safe mode (using F8) and that does not work.
I completely understand that it was a fake warning. I know that Microsoft does not know that my machine is infected and that they can't disable my computer to protect their network. but I wanted to remove the program that was generating the warning from the computer. I use Avast which cleaned a couple of items and them Malwarebytes which found 8 threats. they were cleaned. then the program said to reboot which we did, but it has not come back after numerous attempts. the computer has been OFF for over an hour now, and upon power up, it shows exactly the same symptoms as before. I have left it ON for over an hour with no success. I will keep hitting various keys and let you know.