I left my computer unattended for a while, and I wasn't at all surprised to see that the computer had went black.
I move the mouse, and the lock screen is present. Complete with current time, and up-to-date mail information.
I click on the lock screen, and it animates up and out of the way, and it leaves the screen blank, except for the solid color that I chose at installation (dark blue).
Windows does not resume, the password screen does not come up. After some time of waiting, the lock screen reappears (no slide-in animation, but it might very quickly fade in, I can't tell).
I can't log in, I can't use the computer. Hot corners do nothing. ctrl+alt+del does nothing.
What should I do? How can I prevent this problem from recurring?