I was wondering, I have my comp (XP) set up to install/update every night at 11pm.

However, I think my OS AUTOmatically checks for updates regardless (as long as it's still on)....because today, I all of a sudden saw it downloading updates (11 of them) today around 3 pm EST.

Why is it doing it at that time, when I scheduled my computer to do it every day at 11pm?