Well, a clean installation of Windows later, and my computer boots again, but now has far less junk on it.

OK, just as much junk, since I installed to a new disk rather than formatting the old one, but most of it just got uninstalled by a registry wipe, so I have no idea how long that ACID trial has left to run. Or indeed whether it'll start a new 30 days when I reinstall it, or whether some lofty internet authority will tell it that its number is up, and that I'm not to do any more work on my piece.

We shall see. But not today. I need to get back to the kind of time wasting that'll make my holiday seem less like ... Oh, I don't know what holiday is supposed to feel like any more.