After installing the above, you might still see one "Unknown Device" in Device Manager.
Without these, USB ports, power management, and internal devices fail. sony vaio pcg81114l drivers windows 10 install
This is the most important step. The standard NVIDIA drivers often do not detect the older GPU in this laptop, and running on the Microsoft Basic Display Adapter will cause the screen to flicker or sleep issues. After installing the above, you might still see