How many times have you left Windows running with open applications (or typically several open browser tabs loaded up with work in progress) only to find that it has installed an update and rebooted overnight? Of course, this setting can be altered using group policy, in the registry, or through the Windows UI but some of my systems get rebuilt so regularly I just forget!
Consequently, I was pleased to see last night that my netbook had popped a message in Action Center warning me about the scheduled reboot (and prompting me to change the settings).
I’m not sure if Vista does something similar but this Windows 7 feature saved me from frustration this morning.