DJmetz, I am having a similar situation with my home group... except I can get two systems working but the third system a win7 starter net book won't join... the net book keeps saying enable IPv6. I have enabled the IPv6 and it still will not join. All three systems are running win7. I am now thinking about deleting the home group from the systems and then disabling the IPv4 and leaving it disabled. Then re-activating the home group with only the IPv6 enabled. I haven't tried it yet but I'm beginning to think the IPv4 is causing the interference. Would appreciate your thoughts on this.
Have you tried doing this? /Ken