Failure phenomenon:
When you use a Wi-Fi network, you often drop the line or are restricted, or at some point there is a yellow exclamation mark on the Internet sign in the lower right corner, as shown in the following illustration:
Solution:
1. First look at the wireless signal strength is good (please refer to the figure below), generally more than three grid relatively stable, if the signal is less than three lattice, it is due to signal instability caused by the inability to access the Internet or often drop the line. If your network environment signal is really weak, you can consider putting the notebook near a point in the location of the router, as far as possible not to cross obstacles.
2. If it is not due to weak signal caused by the inability to access the Internet, please refer to the following processing method:
If your system is a Win7 system:
(1) Access to the Control Panel---Network and internet---Network and Sharing Center---Manage wireless networks, select the wireless network that you are using, click Delete (as shown below), and reconnect to the wireless network;
(2) If the above scheme (1) is invalid, please continue to find the desktop computer icon right click Management---Device Manager---network adapter inside find their 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 Lenovo official website, input notebook host number, download and your system corresponding to the wireless network card driver, and then reinstall the wireless network card driver, after installation Restart the computer reconnect wireless.
If your system is a WIN8 system:
(1) Please download the batch processing tool in the attachment: "Wireless Limited", after decompression, the right key to run as an administrator. Restart your computer (as shown below) wireless Limited.rar
(2) The scheme (1) is invalid, please enable "Federal Information Processing Standard (FIPS) compliant" to enhance network compatibility.
Enable method: Right-click the connected wireless signal, select "Properties" click "Security" "Advanced Settings", check "enable Federal Information Processing Standard (FIPS) compatibility" as shown below, without this option , it is recommended to change the encryption method of the wireless router or encryption algorithm to AES (different brands of different models of the router settings method, please refer to the Router manual or the consultant router manufacturer)
(3) If the above scheme (1) (2) is invalid, please roll back the driver of the wireless card to Microsoft's own drive selection "device tube Manager, right-click on "Wireless network card Properties", click "Driver", select "Rollback Driver", the following figure:
