I did not setup a "Home Group".
I only enabled file and sharing and used the "Public" folder to save files through the network.
No passwords and no special User accounts needed to access the Public folder.
BTW, these settings are supposed to only affect when connecting to a "Home" network, and not the "Work" or "Public" network settings.
Currently set to "Home" network for this wireless connection.
Also, my Desktop PC transfers fine to other Wireless laptops running XP, and I originally did the test with only the Win7 on the wireless, while the other laptops were OFF.