The official support page for the model series VPC-F1 (which encompasses the PCG-81114L chassis) is located at:
Under the tab, select your Operating System (e.g., Windows 7, 8.1, or 10). sony vaio pcg81114l bios update link
The official support page for the model series VPC-F1 (which encompasses the PCG-81114L chassis) is located at:
Under the tab, select your Operating System (e.g., Windows 7, 8.1, or 10).