Not sure if this belongs here or on the networking board. Anyway... We have a network of about 20 pcs. I recently installed four new machines that run Windows 7 with Office 2010. The server is running Server 2003. Three of the machines worked perfectly from the beginning, accessing the server and sharing folders and files. One machine will only open files in "read only" mode. I have shared all the folders and given every permission there is but it will only open the files in "read only". It is a critical accounting machine that has to share and change files. What am I missing?