- To fix the Sony Vaio and re-enable Function Keys...
Then you want to select your operating system. **IF YOU ARE RUNNING WINDOWS 8 BETA, DOWNLOAD THE LATEST WINDOWS 7 SOFTWARE AND FOLLOW INSTRUCTIONS FOR A NORMAL INSTALL. (Will elaborate in this post later down the line)**
Select "Sony Shared Library Update" from the "System Components" category. Download and install the file to your computer.
Search for "event service" and "utilities." Download the "VAIO Event Service Update" and "Sony Utilities DLL Update" from the page.
Save any open files and exit from all applications (Trust me and do close all other applications, I've seen this process completely ruin an operating system with other applications open). Double-click the file for the "Sony Shared Library Update" to launch the installer. Click "Yes." Click "Next."
"Read" (Because who actually reads license agreements?) the license agreement, then click "I agree." Click "Finish." Restart your computer. Repeat the steps for "VAIO Event Service Update" and "Sony Utilities DLL Update." Restart the computer after each update. Install Event Services last. After this, your function keys should start to function again.
- Other Laptops (Sureshot method for a FN Fix)
**Windows 8 Users
So you jumped on the bandwagon and got the Windows 8 Preview? There is still hope for your function keys, believe it or not. It's as simple as running all of the setup files with Windows 7 Compatibility (Right-Click -> Compatibility)
You do NOT want to run as Windows 7 SP1, Just Windows 7. Run all driver, software, etc. updates using the proper compatibilities (and if you wish or require, run them as Administrator as well) and restart your computer by using the mouse/touchpad gesture to bring up the side menu (Slide your mouse from the bottom right corner and up, click "Settings", then click "Power" and click "Update and Restart")
If you have any further problems post them here with your computer make and model and I will look into it and find an answer for you