The installer for Window Live Writer.
I was intending to write a post moaning about something entirely different, but I've spent so long trying to install WLW that it has slipped my mind. Whatever it was can't have been nearly as annoying as the ludicrous piece of software that seems designed to hinder a timely install of WLW in any way it can.
Why is this so hard? WLW is a simple, tiny, Windows application. Why can't we just download an appropriately usable installer that just installs the app and gets out of our face, instead of offering a whole suite of other applications, searching the hard drive for something-or-other, and ultimately failing to do what was originally asked of it?