We are in the process of moving to Windows 7 on our domain. However we are beginning to receive calls about users losing their network connection. When you open Network and Sharing Center it says Unidentified Network and the Access Type is No Network Access. I have tried disabling and enabling the network connection but that does not fix the issue. The only fix has been to reboot the machine but after a while the problem happens all over again. I have checked the power settings and sleep mode is turned off. Are there any other suggestions? Our Windows XP machines work just fine so I am sure this is something specific to Windows 7 and not the network.