Here’s a nice gotcha in Windows Server 2012… After installing updates in Windows Server 2012, you will now see the following message:
Restart your PC to finish installing updates. Your PC will automatically restart in 2 days if you don’t restart now.
This can be a particularly dangerous feature for administrators who have fiddly fingers and difficulties arranging outage times with short notice.
I haven’t looked into it, but no doubt there will be a GPO to stop the server automatically restarting after 2 days…