Sony still maintains a scaled-down legacy driver repository for certain regions. Instead of searching by the chassis number ( PCG-81114L ), you must search using the VPCF model number (e.g., VPCF115FM , VPCF113FX , etc.) found on the sticker around the screen bezel or via Windows System Information.
Finding a specific BIOS update for the Sony VAIO PCG-81114L can be tricky because "PCG-81114L" is a chassis number; the actual model name you need for support is often something like www.sony.com Direct Support & BIOS Update Links Official Support Page sony vaio pcg81114l bios update link
Disclaimer: Updating the BIOS is done at your own risk. Incorrect installation can damage your laptop. Sony still maintains a scaled-down legacy driver repository
If yousony-asia.com/electronics/support/laptop-pc-pcg-series/downloads">Sony Asia Pacific PCG Series Support page . 5. Why Update Your BIOS? sony vaio pcg81114l bios update link