Recently I came across this problem. The company I work in has about 30 computers and some servers. Some of the computer I try to turn on the network and sharing connecting to the domain and save changes but it did not save and don't have any error on the changes. But when I go in again, its show network and sharing turn off.
The PC is using Window 7 Pro, CPU - Intel i5, 2GB RAM and 500GB hard disk.