Hello Peter, I understand your concern regarding the issues with the function keys on your Sony Vaio VGN-FE21H after installing Windows 7 build 7100. It seems like you are experiencing compatibility issues with the drivers, specifically the chipset drivers. Here are a few steps you can take to try to resolve this issue: 1. Check for Compatibility: Confirm that the drivers you downloaded from the Sony website are indeed compatible with Windows 7. Sometimes, older drivers may not be fully compatible with newer operating systems. 2. Install Drivers in Compatibility Mode: - Right-click on the driver installer. - Select "Properties" and navigate to the "Compatibility" tab. - Check the box that says "Run this program in...