Okay, so I've been running Vista on my machine since last summer and just recently encountered a very annoying thing. I always just leave my computer on for weeks at a time, so when I wake up and find that it has rebooted, I am very annoyed. I checked the auto update page and it is set to install updates automatically at 3AM without prompting or anything. This causes the machine to download updates while I am asleep, install them and reboot the system, causing me to lose work in programs I have open. To make matters worse, I can't change any of the options. It says that "Some settings are managed by your system administrator." What does that mean? I am the only user, I have an admin account and have disabled UAC...why can't I change it? This is very annoying as it won't even tell me when it has updates - just reboots!! Any help would be greatly appreciated.