Hcl/hcl leaptop
Egarding drivers

I hav an HCL b38 leaptop. When i had brought dis it was with vista. But now i hav installed windows 7 ultimate in it. But with this it has no compatible many drivers missing like bluetooth, webcam, graphics, wifii. Also no idea from where to control itz brightness. Also these r not enabled on net. I searched a lot. Even not on dere original site. Plz help me out. Or tell me from whr i cn get my drivers