Last Updated: October 2025
Applies to: Sony Vaio VGN (Model PCG-31311X) / Windows 7 (32-bit & 64-bit)
If you are reinstalling Windows 7 from scratch on a Sony Vaio PCG-31311X: Drivers Sony Vaio Pcg 31311X Windows 7
Driver Order Matters: Always install the Sony Shared Library before the Notebook Control Device or VAIO Event Service, or your hotkeys likely won't work. Drivers and Software updates for Laptop PC | Sony USA Complete Guide to Sony Vaio PCG-31311X Drivers for
Sony VAIO laptops are sensitive to the order of driver installation. To avoid issues with "Hotkeys" or power management, follow this sequence: Operating System (Windows 7) Motherboard/Chipset Drivers Sony Shared Library Drivers Sony Vaio Pcg 31311X Windows 7
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