Sign out of the Homegroup with all computers on the local network. Power down all of them but the main one. Go to Homegroup Control Panel, and set up a new Homegroup. It should assign a new password....

Thanks for the comments. I ended up going full circle and gave up on file sharing, and went back to Homegroups. What I found is that there is some issue with my older laptop on wireless. Speed...

I had local file sharing when my home network consisted of XP and Win 7 computers. I just right clicked on folders I wanted to share in Windows Explorer and designated them as shared. Simple and...