Keyboard Backlight not working in Sony VAIO S after upgrade to Windows 8 Pro

Hi Suvam,

Thank you for reaching out to the Microsoft Community!

Based on the description, it appears that backlight is not working on the Sony VAIO S keyboard after upgrading to Windows 8.

To guide you in the right direction, I need a few more information from the computer that has the issue. Please help me answer the following questions:

1.      Did you check the VAIO Utility for Windows 8 Upgrade before upgrading?

2.      Did you run Windows 8 upgrade assistant?

3.      Were there any recent changes made on the computer prior to the issue?

I can understand the inconvenience caused to you. I will certainly help you out with this issue.

Here are few methods that you may try in order to fix the issue.

Method 1: Run the Hardware troubleshooter and check.

Follow the steps to run the troubleshooter:

a. Press Windows key + C on your keyboard to show the Charms bar, click on search.

b. Type Troubleshooting and click Troubleshooting under Settings.

c. Now type Hardware Troubleshooter in the search option.

d. Click on Hardware troubleshooter to run the troubleshooter.

Method 2: Install the drivers from the following link and check.

http://www.sony-asia.com/support/download/519785/product/vpcsb26fg

Method 3: You can install Windows 7 drivers in compatibility mode if there are no Windows 8 compatible drivers.

Follow these steps:

a) Press the ‘Windows + W’ key on the keyboard.

b) Type compatibility in the search box and then press enter.

c) Click “Run programs made for previous versions of Windows” option from the list appeared in the left side.

d) Select the drivers and install.

If the issue persists or you have further questions on Windows, please do not hesitate to let us know. We will be glad to help you.