Most PCG-31311M laptops utilize Intel architecture. Here is the checklist of drivers you need to get your system fully operational.
If you perform a clean install, you will likely need these specific components to make the Vaio-specific features (like Fn keys) work: Sony Shared Library : The foundation for all other Vaio utilities. VAIO Event Service : Enables hotkeys and volume controls. Notebook Control Device : Essential for power management. Graphics Driver : Typically AMD Mobility Radeon HD 6310 for this series. 4. Alternative Recovery Method Drivers and Software updates for Laptop PC | Sony USA Sony Vaio Pcg-31311m Drivers Windows 7
A: Yes, if your model has at least 4GB of RAM. 32-bit drivers work, but Sony does not provide 64-bit audio drivers – use Realtek’s generic 64-bit HD Audio driver. Most PCG-31311M laptops utilize Intel architecture
Search for the model or VPCYB35AG on the Sony Asia or Sony UK support archives. The PCG-31311M is the chassis code, but the "VPC" code is what the database recognizes. ⚠️ Important Installation Tips VAIO Event Service : Enables hotkeys and volume controls
Reboot after each.