Boot Camp - "No AMD graphics driver is installed" error during win8.1 post-install

I have Macbkook pro early 2011 (i7 2.2ghz, 16 GB RAM, radeon 6750M 1GB)

I used boot camp utility to install win 8.1 - it completed without any problems.

When the installation was completed the bootcamp wizard opened automaticaly and this was shoved to my face:

The process continued until the "Installing Intel Graphics" process. Then the screen just went blank. I waited some time

assuming it was just a gpu driver issue and the installation is progressing. I guess I was right since the mac rebooted after about 5 minutes.I re

When I wanted to boot to windows I was constantly welcomed by black screen after the "windows splash-screen-spinning-animation thingy".

I went to safe mode to see what's going on. It turned out that if I TURN OFF my INTEL HD 3000 driver then I can boot to normal mode but

the 6750M drivers have yellow exclamation mark (error 43 in details) in device manager. I need that gpu enabled since I do some game developent which requires gpu power. I tried reinstalling ati drivers and looking for new ones on the internet - each of them failed. What could be the problem?

Can anyone help me out?