At the office we have a computer running windows 8 and another computer running windows XP. We puchased quickbooks 2013 (two copies to run multi-user). We have installed QB on windows 8 and that is where the file are stored. The other QB is on windows XP as a workstation. We have attempted to network and use quickbooks in multi-user mode but have not been successful. We ran the "Network Diagnostic Tool" but that did not help. We set QB to run in multiuser mode on windows 8, but when I attempted to eccess the fie in QB in windows xp it says that QB can see the file, but there is a communication problem. We are at a loss as to know what to do to get this to work. Any help would be greatly appreciated.