After setup homegroup and get its password ; didn't appear any window for asking password on other homegroup PC , According Win 7 help(( Click to open Network and Sharing Center.. Click Set up sharing with a homegroup. Click Join now, and then type the homegroup password.)) but in Network and Sharing Center on other computer don't exist "sharing with a homegroup" option. *both computers linked via ethernet cable straightly. *in Network Map, the other PC exist.