Solve the problem of IdeaPad y400&y500 wireless restricted under Win8

Knowledge Point Analysis:

Recently, more friends feedback using y400/y500, pre-installed Windows 8 system, connect the home router AP, high probability of wireless restricted access to the situation, there is a problem after the need to reconnect WiFi, the lower right corner of the network exclamation point icon. The following figure:

After analysis, the user model configuration of the wireless card is Broadcam 4313. This issue can be resolved by changing the wireless network card properties.

The compatibility of the NIC with the router and Microsoft's latest Windows 8 operating system have led to such problems, not the machine's hardware failure.

Operation Steps:

Step One: The wireless network card automatically save the option to turn off.

Click Device Manager, select Wireless network card properties, and click the power supply Tube

The "Allow the computer to turn off this device to save power" option is removed by the hook, as shown in the following figure:

Step Two: Enable Federal Information Processing standards (FIPS) compatibility to enhance network compatibility

Right-click on the connected AP signal, select "View Connection Properties" Click "Security" "Advanced Settings"

Check the "Enable Federal Information Processing standards (FIPS) compliant" figure below, and if this option is not available, it is recommended to encrypt the wireless router.

Change to AES encryption method:

Step three: Roll back the driver for the wireless network card

Select "Device Manager", right-click "Wireless Network Card Properties", click "Driver" and select "Rollback Driver", as shown below:

Step four: Optimize TCP configuration for Windows 8