Does your network adapter get disabled after resuming from sleep mode (wake up from sleep)? If yes, then we have a solution for you. Here is the quick rundown of the problem and its solution. By default Windows 7 will disable a network device to save power, all you need to do is to tell Windows to mind it’s own business. Go to Device Manager, right-click the network adapter (that keeps getting turned off), and select Properties.
Now head over to the Power Management tab, uncheck the option that says “Allow the computer to turn off this device to save power”, and Hit OK.