My Windows 7 and Windows XP computers can't talk to each other. They have = the same workgroup and are in the same subnet. Windows 7 can ping XP by IP= address but not by hostname. Windows XP can't ping Windows 7 by IP addres= s or host name. They were talking to each other until I restored the XP co= mputer from a backup, so I don't think the issue is with Windows 7. Any id= eas?