Since the official Sony download portal no longer hosts most Windows 7 drivers for this model, use these alternative methods:
Most PCG-61313L units feature a processor and Intel HM55 Express chipset. Below are the critical drivers you will need for a clean Windows 7 installation: sony vaio pcg 61313l drivers win7
Look at the bezel around your laptop screen; the model (e.g., VPCEA21FX) is often printed there. Since the official Sony download portal no longer
After this, test the Fn+F5/F6 keys for brightness. the model (e.g.