"Back in the old days when TVs and radios had tubes, it took a couple of minutes for a set to warm up before you could watch or listen. But even then, you could turn it off instantly. That's not true with Windows PCs. Not only does it sometimes take seemingly forever for them to boot, but it can take several minutes for one to shut down.
Even worse, if a program stops responding, you may or may not be able to shut it down. And even if it does terminate, it may take awhile.
And by the way, I'm not just talking about Windows XP and Vista. I'm having the same problem with Windows 7 though, to be fair, the new operating system is still in beta so it's possible that Microsoft could amaze and delight me by fixing this in the final version."