Why is the network of win7 computers often disconnected automatically?

Xiaobian has a friend, especially likes online games, especially online games. That is his true love. It is said that his love for online games started from the high school era. At that time, although the computer was not very popular, it was because of the school. For the sake of it, I often go to the Internet cafes with my classmates in groups of three, but I didn't think that this hobby has not been quitted until now. Even if I work, I am running fast, I still like to play. But what makes him most depressed is that his win7 Ultimate 64-bit system downloads the computer, and often there will be automatic disconnection, especially in the online game, this is very hurtful! So, is there a way we can Solve the failure of win7 Ultimate 64-bit system download automatic network disconnection?
1. First, let's move the mouse to the network icon in the lower right corner of the screen and click, then select to enter the network and sharing center interface.
2. In the open interface, we click on Change Adapter Settings in the left menu.
3. In the pop-up network connection window, we right click on the local connection and select Properties from the slide-down menu.

Properties window will appear 4. After, let's click Configure, and then in the "Realtek PCIe Family Controller Properties" panel will interface to switch to the power management here in this column, it will allow the computer to turn off this device to Select the Save Power option and click OK to save the settings.