I have a new or reformatted machine that has Windows 7 pro 64 bit that cannot see xp machines and the xp machine can see, but cannot access. I have home group off set to work. network discovery on, file and print sharing on, public folder sharing on, password protection off, use user accounts and pw to connect, same username and password on each of the machines, etc. I can ping and i can access from xp machines if i use the ip of the Windows 7. They are on DHCP. please help.