I got a new laptop a couple months back. It came with Windows 7, and I thought, ok, what the hell, I might as well fire it up and see what this is like.
It took somewhere upwards of 15 minutes to finish some final installation step, and the first thing it presented me with was a notification dialog explaining that Explorer had crashed.
I haven't actually booted Windows since, which leaves me with a personal average boot time considerably over 2 minutes...