I had clicked on it much earlier, under the impression it was the casual "You are an Idiot window."
I was right, and I was wrong. You modified it quite nicely, I must say.
While I didn't need to unplug my computer, nor turn it off for that matter, it did take me a minute or so to close.
Luckily, I caught the "Set Homepage" window, and avoided clicking it, not that it would matter much, as you can change your homepage without opening Explorer.
None-the-less, I was quite impressed. It was edited nicely. Annoying, but I'll give credit where credit is due.