Two computers. Client machine is Windows 7 Ultimate. Server machine is Windows Server 2012 Essentials. They communicate via a gigabit switch connected using Cat6 cables. Both NICs are gigabit capable. IP configuration seems fine and they are both on the same subnet. I have mapped a network drive (shared folder) from server to client. Administrator credentials were used from server (when setting up the mapped network drive on client) and full read/write acces is granted. Network drive is mapped successfully and reconnects at logon with no problems. I have access to the network drive, the shared folder (and subfolders), and all files are visible. I CANNOT TRANSFER/ COPY/ CUT FILES FROM CLIENT TO SERVER. The transfer initiates, takes a minute while it is "caclulating", and then shows a speed of approx. 22.7 KB/sec. The progress bar never moves and there is no estimated time for completion. I need help.