Home group working fine...mixed 7 and 10 machines no problem.. I have a shared folder on machine A, that I want to write to from machine B which has the same user/password as an administrator on machine A. I set the folder to 'everyone' or ' homegroup', and I can write from machine B no problem. However, is there a setting that will allow me to continue to write from machine B, while excluding machine C (which is on the home group too)... In other words I want to be able to backup from machine B without out other homegroup machines being able to see the backup... Is there a way without taking down homegroup and having credentials ?