Homegroup reappears after doing factory reset

I performed a factory reset which went fine. When I click on Homegroup it says I can join the one I previously setup on the machine before the factory reset, i.e it is asking me to join my own Homegroup. I do not have the password for my (old) Homegroup.

I've tried some of the solutions I found on here (deleting files in Appdata/... and stopping the service but the old Homegroup still persists.

1) Do you usually join your own Homegroup?
2) Is there a way to get the password?
3) Can the old Homegroup be erased?
4) Any other suggestions?

Thanks for the help.

No one uses Homegroup. Majority of us use standard Network Shares. Homegroup has been broken from day one.