Update Link: Sony Vaio Pcg81114l Bios

Sony lists drivers and BIOS updates by the Product Name (e.g., or VPCF1290X ), not the chassis number. You can find this on the manufacturer's plaque on the bottom case or via software:

Before updating, you may want to check your current BIOS version: your VAIO completely. Turn it on and immediately tap the key repeatedly when the VAIO logo appears. If F2 doesn't work, some models require pressing the sony vaio pcg81114l bios update link