I purchased a sony vaio vgn-fs215s, with windows xp and, after many years of loyal services i decided to format de hard drive and installed windows 7. It works great and is as fast as new but... fn keys to control sound volume, brightness, etc stoped work. After searching on sony drivers could not find for my old notebook. Can anyone, please, tell me how to solve this big problem?. I need to control brightness because I take many photos and cannot seem them properly before printing, so I waste to many ink cartridges.