i had a Home Group set up between several Windows 7 PC's until i upgraded one to Windows 10 and the home group had connection problems. I tried to remove the Home Group and removed every PC from it manually. Now all the PC's including the Windows 10 PC think there is a join-able Home Group from witch i don't know the password, and since it's without member PC's i cannot recover the password from the current one.
How do i get rid of this ghost Home Group?