Win7 system NIC is disabled solution

Win7 system network card is always inexplicably disabled. What should I do? The following small series will introduce you how to recover the network card is disabled.
1. First, right click on the computer on the desktop to select the properties, as shown in the figure:

2. Then open the device manager, as shown in the figure:

3. Select the network card in the network adapter Figure:

4. After double-clicking, select the Power Management tab, and you will be able to solve the problem that the Win7 system NIC is often disabled by "Allow the computer to turn off this device to save power" option.