I've spent HOURS, no, DAYS to get this to work. I've tried with 128 on and 128 off. Obviously IPv6 off doesn't work. I've tried starting over on Homegroup...all off, then starting with each of my 3 PCs as the starter w/password. (HG off on all 3, then A is starter, then all off and B, then all off then C). I thought maybe it was because one of my systems was a Win7 upgrade from Vista and the other 2 wer full installs, so I crashed my good system and spent days building a full install, only to find no answer.
What I meant by IPv6 possibly the problem is that my Router (Netgear WNR3500 gigabit & wifi) is possibly not passing on the IPv6, but I have no way to know this.
I gave up trying the wifi (my 4th PC a laptop with Win7) until I can get the wired ones working. Doesn't someone at Microsoft have the answer? I've been working on this since November...I put questions on the Win 7 Forum, Vista Forum, MS Answers and googling all over with no answer. Obviously MS has not tested this enough (personal opinion). HELP
Dale
Retired computer guru