I have two Dell desktops with XP sp2 and One Dell laptop just upgraded to Vista. The problem is file sharing. Desktop 1 and the laptop/Vista can see and share each others files with no problem on any drive letters. Desktop 2 can see D: on the laptop and share its files. It sees C: but cannot access the folders/files on C:. The laptop/Vista can see and access all files and drive letters on Desktop 2. To put it another way, my wife's computer can see and share C on the laptop, I cannot. The laptop can see and share both desktops. Both desktops are configured the same. I'm Using windows firewall which has been disabled at times for testing. I'm not sure if this is an XP or Vista problem. Any ideas out there.