I can't connect to all pc's on my local network. I keep getting message "Windows cannot access …". I also get the same message if I try to access the 8930 from another PC on the network. I tried pinging another PC and I get a response but if I try from file explorer I get the error message. I have 6 PC's on the network and I can access 3 of them but not the others and I can not access the 8930 from any of them.