there is one program running that resists the forced close implicit in shutdown. See if task manager (ctrl-alt-del) will still come up if the system hangs. That might show what process it is. Not sure, however, that it works.
I'm having an issue where 7 won't shutdown. It will close everything on the desktop and go to the "logging off" splash screen but that is where it just hangs up. It won't do anything even after about 5 mins. I have to hold the power button to get it off. Then every time I restart, I have to tell it to boot normally because it says every time that it wasn't shutdown correctly.
I just noticed this a couple of weeks ago and don't think it was after any of the recent updates from 3 weeks ago (malicious removal tool, junk filter, ect). I also haven't updated or installed any new programs. (although, maybe I did just recently install free zonealarm, but i don't think it was that.) Any ideas?
windows 7 ultimate x64
intel e6850 core 2 duo
evga 680i LT mobo
4gb corsair xms2 mem