I've been very happy with my Windows XP SP3 box, but right now it is shutting down, and has been for 15 minutes, pausing while "Installing update 1 of 1..", this then changes to "Do not turn off or unplug your computer; it will turn off automatically." and then back.
Normally I hate to interfere with this kind of thing, but right now it seems like something is wrong. In fact, the screen just blanked into power-save mode, but it keeps going after I hit a key.
What possible update is out there this week [Oct 19-23 2009] (I just did an update last week) and is it supposed to take a very long time?