Windows 10 drivers problems on Macbook pro 8,2

Hi everybody, so i installed windows 10 using bootcamp, and all the installation was successful except on one thing:

my amd hd radeon driver is not working (code 43), and i also dont have sound (code 10), i try to reinstall bootcamp and windows but nothings happens, i also try to download the drivers from the amd website and update windows to the last version but i didnt have results, please help and sorry for my bad english