Is there some way I can turn off the "feature" of Windows automatically rebooting my computer after it downloads updates?

I usually have 10 or so windows open - enterprise manager, query analyzer, source safe, VS, 5 windows explorers so I can easily go to all the directories I use frequently...then I come in in the morning and all of it is gone, not to mention the ad hoc queries I didn't bother to save.

This never used to happen at my last job for the 18 months I was there. I would be notified of updates and I could ignore them for a couple of days but when I installed them it was because I was ready to reboot. It happens all the time here. I hate when software makes decisions for me.

Thanks.