Ideally, you download the bios update from respective laptop manufacturers. This section provides an information where you can get the Bios Updates.
Go to google.com, use this search pattern:
Use the Serial Number or Model Number to find the exact match for your laptop.
Use SNID to correctly match the exact model.
Use the service tag to exactly find the correct model.
Go to the link below and click “Get Downloads”, then search the model that corresponds to your laptop.
Use the model name to search for the exact bios update for your laptop.