Firmware upgrade - PC

Does anyone know a site where I can get a firmware upgrade for any PC?, levono thinkcentre is perferred

Why do you need it would be my first question and can you be more specific about the model at all would be my second?

to expand the system’s ram memory, do not know model number, do you know how I might be able to find the model number?

On the laptop. It’s usually printed on it or on the label on the bottom of it. It says “Model Number”

http://support.lenovo.com/us/en/find-product-name