I have a well established workgroup with one Vista Ultimate x64 and several XP-Pro workstations. All have the same users with the same attributes (user, administrator,...). All can access the internet via a router and all can READ files from any other shared drive/folder on the workgroup :D. All of the XP boxes can also WRITE to the other XP boxes as appropriate. So, the sharing and permissions are set up correctly for the XP-PRO boxes. The problem is that I cannot WRITE to the Vista box from any of the XP-PRO boxes 
. I have set it up with the same permissions as I use in sharing on the XP boxes. It does not matter whether I have enabled password protected file sharing on the Vista box or not. If I try to copy a simple text document to the Vista box, the error I get is: "Cannot copy New Text Document: "Access is denied. Make sure that the disk is not full or write-protected and that the file is not currently in use". None of these conditions is true. Any help appreciated.
. I have set it up with the same permissions as I use in sharing on the XP boxes. It does not matter whether I have enabled password protected file sharing on the Vista box or not. If I try to copy a simple text document to the Vista box, the error I get is: "Cannot copy New Text Document: "Access is denied. Make sure that the disk is not full or write-protected and that the file is not currently in use". None of these conditions is true. Any help appreciated.
I'm not sure exactly what happened, but I now have WRITE access to my Vista box. "Network file sharing" was already enabled. "Share this folder" was already checked and the permissions were correctly set. I did add "Everyone" to try it out and, of course, it worked. But even though I think my network security is pretty good, I went back and removed Everyone. It still worked and now seems to work from both of my test XP boxes. Thanks for the help.