All of a sudden when closing down, I have been getting a totally blue screen that doesn't respond to the keyboard, but does have an active and controllable cursor on the screen. I wait a while, an as nothing is happening, I power off. However, after going black the screen turns blue again, but no cursor...and the computer's power light is blinking, indicating Sleep. Again, with nothing happening, I hold the power button a bit longer this time, and the computer does power off. I restarted and to my surprise and delight, I was asked for my PW. This has happened twice. BTW, I do have a Sleep icon on the task bar???