Lenovo Y485P upgrade Win8.1 wireless network card is not connected to what to do?

Recent notebook automatic upgrade---Lenovo Y485P, the original Windows 8.0 wireless network card is no problem, and after upgrading to Windows8.1, there is a problem, the computer automatically sleeps the network card is limited, the Internet will automatically drop in about 40 minutes Line, the official website driver I have updated, but it seems that there is no update file, and later I accidentally saw the hardware and found it wrong. After two days of testing, I found that this method is very practical, so share it with everyone

1. Right-click "This computer" to select "Properties",

2, pop-up "System" and select the device management on the left side of the window. "," enter the "Device Manager" and then select "network adapter"

4, click open & ldquo; network adapter & rdquo; Right click on "Broadcom 802.11 a network adapter, select update driver software

5, select browse browser to find driver software in pop-up window

6, pop up new Select from the window, select

7, new from the device driver list of the computer Cancel in the window, display compatible hardware, the previous check

8, the left side of the following network card selection, select Broadcom on the right side and select “Broadcom 802.11 g network adapter, next step

9, pop-up update driver warning<selection" is “

10, Windows has successfully updated the driver file and select to close.