Ach, I hate manual installs of Vaios. As I recall, you need to install the drivers in a certain sequence to get it to work correctly. There's also some difference in the availibility of drivers between sites and depending on whether or not you log in. Try
this website first and follow the links manually - select computers/ notebooks and then use the bottom drop down to select your model directly. This website offers original patches as well as updates so you might have some luck here. Also you may want to bookmark
Driverguide and sign up (it's free and they never bother you). Don't give up - you can master Sony's 19th century websites you can master anything