I just added a windows 7 netbook to my LAN. (intended for communication and resources while servicing computers)
The 3 XP computers on the LAN share without a problem.
The Win 7 computer can see all 3. Can access K and S. Requires a login on computer R. Computer R has never had a password.
There are more resources opened to share on R than the other two.
I have disabled the login requirement for sharing on the Win 7.
Why is Win 7 being stubborn?
It is making me feel like I have never set up LANs or sharing in my life.