The problem im having is that i have quickbooks installed and the data shared on a new computer with Windows 7 Pro x64. Everything works great until we go home for the night, when we come back in the next morning none of the computers can connect to the windows 7 shares until we restart the windows 7 computer. The computers trying to connect are windows XP pro and windows vista business. All of the computers get the generic check with an administrator you may not have permission to connect to that resource message.

Turn off the power saving feature of the NIC is one step, if that isn't the problem then the machine is going to sleep and shuts down the resources, so check your power scheme settings.MCSE, MCSA, MCDST