A great way to start Friday 13th. Both of my laptops stuck doing Windows Updates which seem to lock the machine up when it reboots, and then fail, so that when I do a reboot it happens all over again.
Turns out this is a known issue of sorts. If you go here you will find some discussion and things you can try. I managed to fix the problem by only installing one update at a time, rather than all at once, in the order suggested by a post on this thread. If you have this problem make sure that you install KB2534366 after all the rest.
And have a nice Friday the 13th.