Windows 7: computer that created HOMEGROUP is no longer working!

I had to replace my hard drive in my computer and did so, re-installing all of the necessary drives and components, and when attempting to create a homegroup using the new "computer" (old tower with the new 2TB drive and reinstalled windows, etc) it is telling me that the old "computer" (the drive that crashed) has the password for the homegroup, but OBVIOUSLY I cannot access that "computer" because the drive crashed. How do I delete the homegroup that was created by the dead and therefore inaccessible computer and create a new one with the new computer? Please help!

You need to first leave the Homegroup from all the other Homegroup machines. This will clear the Homegroup credential cache.

After that you should be able to create a new Homegroup and then rejoin from all machines.