I noticed that Windows performed a monster auto-update today. It took about half an hour to download and install, and since then my windows (xp-pro) has become unusable. Explorer windows freeze, and simple directory changes take minutes to display. Same for navigating any open/save file dialogs. My windows was pretty sluggish before, but now it's hopeless. Did anybody have a similar experience? I don't suppose there is a way to undo the update?