How to troubleshoot Wi-Fi issues (Windows 8 and 8.1)

In recent years, the number of home networks has been drastically increasing, especially in cities. As a result, the computer may face network and Internet connection issues.

In order to quickly resolve network and Internet issues, here are a few recommendations to follow.

1. Reboot the computer and the router
2. Prevent network adaptor from going into sleep mode and disable USB selective suspend setting 
3. Remove antivirus software 
4. Check for BIOS or Driver updates 
5. Reinstall network driver
6. Recover the computer

Reboot your computer and the router

Please switch the computer and the modem/router OFF, then after a few seconds turn it ON and wait until it is completely boot up. Then, connect the computer to the modem/router again. Doing so will reset your Wi-Fi adapter and establish a new connection.

Prevent network adaptor from going into sleep mode and disable USB selective suspend setting

If your connection issues mostly occur after you have not used your computer for several minutes, prevent the network adaptor from going into sleep mode:
Press the Windows Key + w to open the Settings search box. Type Network and Sharing Center.

Click the name of your Wi-Fi network and choose the Properties button.

In the Wi-Fi properties, click the Configure button.

Then, click the Power Management tab.

Uncheck the Allow the computer to turn off this device to save power. Then click OK.
f this does not solve the connection issue, disable Selective Suspend. Disabling this option allows full power to be sent to the device at all times, but remember that it can negatively affect your battery life:
Press the Windows Key + L to open the Settings menu and select Control Panel.

Select Hardware and Sound.

Then select Power Options.

On your selected Power Plan, select Change Plan Settings.

Then select Advanced Power Settings. Move to USB settings and disable USB selective suspend setting.

Temporarily remove antivirus software

Press the Windows Key + L to open the Settings menu and select Control Panel.

Select Uninstall a Program from the Programs category.
The Uninstall or Change a Program window appears, listing your currently installed programs, their publisher, size, installation date, and version number.
Click anti-virus software and click Uninstall to completely remove the program from the computer as a temporary action.

If your antivirus software was the cause for internet issue, it is advisable to install another antivirus software.

Check for BIOS and driver updates

For some models, a BIOS update may be available to improve the computer performance.
Please check on the download section if a BIOS update is available.

Reinstall Network driver

Reinstall the LAN driver: Press the ASSIST button to launch VAIO Care, select Advanced Tools. Select Restore and Recovery/Restore/Reinstall applications and drivers. From the displayed list of applications and drivers, rein-stall the Wireless LAN Driver and restart the computer.

Recover the computer (Windows 8).

This will ensure your computer is reset to its factory settings for best performance.