No Sound, can't control brightness

Since I installed Vista on my laptop (Sony FS 645) I haven't been able to controller the screen brightness like I used to with XP (Fn+ F5/F6) or the volume (Fn+ F3/F4) Also, my laptop hasn't HAD sound since I installed Vista.

What can I do to fix this?

Thanks in advance.

#447678

I had the same problem with my desktop when I went to Home Premium. I had to install the drivers using the "Have Disk" feature. It will tell you that the driver is not designed for Vista, just click Continue and it should work fine. The only thing that didn't work on was my wireless card, had to crimp out a 100ft cat5 and go back to wired.

#447683

Have Disk? What do you mean?

#447700