This has been an odd experience. I can only network to my Windows 7 desktop for only the Public area, from my Windows 7 laptop. As many times as I try to get to My Documents or the entire c drive, I can not open them. I manually shared my "music" and "my pictures" but can not do the entire drive or documents. Doing all the same to share those.
Homegroup does not work at all even after using the homegroup key but under normal Workgroup networking, works between all our home computers. All the WinXP computers are available in total (c drive etc) from either Win 7 computer. It is only the newest, Windows 7 desktop that either has an unusual setting I don't see or the default is to only allow only "public." All the obvious, from not using a pw, to checking all files in the networking area, to manually trying to share/advanced share, etc. Appreciate any ideas or input.