I'm using Windows 7 Homegroup to connect the house computers and it works well. I just built a new machine and it's running well. It recognizes the Homegroup started by the correct name but when I put in the password (yes, the correct one) it says it's wrong. I even changed the password and the other machines in the house were prompted to switch and they connected just fine. The main computer just doesn't seem to take the password from the new one.