The Pc was enabled "file and printer sharing" and sharing file on another network storage on the same network.

But one day, my friend accidentally unchecked the "file and printer sharing" in <network connection>. Then we cannot check it back.

When we checked the box again, and click OK. We use to see a message showing that we are going to disable the "file and printer sharing". Thus we cannot enable it again.

We cannot fidn out any solution til now. Can somebody help us???
Thank you very much !!!!