Windows 7: Win 7 saying Homegroup created by Win Vista

Here's my current set-up:

1 laptop running Windows Vista with a wireless connection
1 laptop running Windows 7 with a wireless connection
2 desktops running Windows 7 with a wired connection

Using the Windows 7 laptop, I tried to create a homegroup but I get the message that a homegroup has already been started on the laptop with Vista on it.

Except there are no homegroups with vista.

None of my computers are networked nor were they networked before this at any time.

I am unable to create a homegroup because of this weird conflict that seems as if it's impossible to exist.

Any idea how/why my Windows 7 computer is telling me my vista computer created a homegroup? It's asking me for a password I never created (since I can't create a homegroup under Vista anyway)

Help please! Thanks!

SG