We recently installed Windows Server 2003 Service Pack 2 on a group of servers. The problem was that the service pack changed the settings for automatic updates, but only on just over half of our servers. Previously, the automatic updates were all set to automatically download updates and let me choose when to install them. After the SP2 installation and unbeknownst to me, the setting was changed to automatically download and install updates at 3 AM. Needless to say this was a huge issue the next day when, at 3 AM, our servers started going down. Unscheduled downtime is not fun in any server admin's world. To complicate the matters, the SQL service on one of the servers failed to start because of the reboot. My questions: What happened to cause some servers to have their automatic update settings changed? Is this a know change that happens with SP2? Is there any way to prevent this in the future?