IdeaPad Y470 Wireless Internet access or restricted how to solve?

Failure phenomena:

When using Wi-Fi, it is often dropped or restricted, or there is a yellow exclamation mark on the Internet sign in the lower right corner, as shown in the following image:

Solution:

1. First check the wireless signal strength is good (please refer to the following image), generally more than three more stable, if the signal is less than three, it is due to signal instability caused by the lack of internet access or often dropped. If your network environment signal is really weak, consider placing your notebook near the router and try not to cross the barrier.

2. If it is not due to the weak signal caused by the Internet, please refer to the following processing methods:

If your system is a Win7 system:

(1) Enter the control Panel---Network and internet---Network and Sharing Center---Manage the wireless network, select the wireless network you are using, click Delete (image below), and then reconnect the wireless network;

(2) If the above scheme (1) is invalid, please continue to find the desktop computer icon right click on Manage---Device Manager---network adapter find your wireless card right click Properties---Power management---Remove the "allow the computer to turn off this setting to save power" tick.

(3) If the above scheme (1) (2) is invalid, please click here to visit the Lenovo official website, enter the notebook host number, download the corresponding wireless network card driver, and then reinstall the wireless card driver, after installation, restart the computer to reconnect the wireless.

If your system is a WIN8 system:

(1) Please download the batch processing tool in the attachment: "Wireless Limited", after decompression, right-click to run as Administrator. Restart your computer (see figure below) wireless Limited.rar

(2) If the above scenario (1) is invalid, enable Federal Information Processing standards (FIPS) compatibility to enhance network compatibility.

Enable method: Right click on the connected wireless signal, select "Properties" click "Security" "Advanced Settings", check "enable Federal Information Processing Standard (FIPS) compatible" below, if this option is not available, it is recommended to change the wireless router encryption method or encryption algorithm to AES ( Different brands of different models of the router Setup method, please refer to the Router manual or consulting router manufacturer)

(3) If the above scheme (1) (2) is invalid, please roll back the driver of the wireless network card to the Microsoft Self-Drive Select "Device Manager", right-click "Wireless network Card Properties", tap "Driver", select "Rollback Driver", as shown below:

(4) If the above scheme (1) (2) (3) is invalid, enter the notebook host number, download the wireless card driver under the system you are using, then reinstall the wireless card driver, after installation, restart the computer to reconnect the wireless.