BF3 freezing 6800 series

[Puruluu4ever]

Lets start by saying, I am no good with computers. 

Most of the time the game just freezes in loading screens, but sometimes often when I just start-up the computer

the game can work. 

I have the latest updates to my graphic card Radeon 6800 series. 

I have played the game for about 1 h, im getting very tired of this crap. (sorry for my language)

What should i do?

Warm Regard

Anders