This is a known issue from the license manager function that retrieves the MAC address in Windows 7, 64 bits. This happens when there are a lot of local area connections for the tunnel adapters on your computer. This can be confirmed using the “ipconfig –all” command in a command prompt. To resolve the problem, the connections have to be removed. To do so:
1) Open the device manager.
2) Select View/Show hidden devices.
3) Scroll down to the network adapters.
4) Right click and uninstall all but 1 of the tunnel adapters.