We are having the same problem. When the Windows updates hit we have all kinds of different network problems. We have a peer to peer setup and the main computer had a pushed update that locked out everyone in the office, including itself. Kept getting the error message that "the version of AC on this computer is not the same as the main computer" but this was on the main computer! I had to get Guardian Angel support to log in to help reset things. Typically the problem is just from one of the desktops or laptops not being able to find the main computer and AC. When this happens, I have to go in and reset the paths and then find AC on the main computer in the network. Just did it again this morning.