Engerek01: What is the error message if you are getting any?
What is your gpu?
What do you mean by "all the patches". As far as I know IWD2 on GOG is fully updated. I maybe wrong.
ps. I have win7 and it works fine for me without doing anything.
It just says the game stopped working
Playing on a laptop, Nvidia Quadro K1000m, but I just realized that I'm running the game using my integrated graphics card, let me switch over and see if it works...
Nope
And by all the patches, I mean the tweaks.
Harangerish: I installed all the patches I could find, nothing worked.
Hickory: Have you been doing everying hap-hazard and willy-nilly? IWD2 needs *no* patches, in fact how on Earth did you install patches? They should have aborted with an up-to-date installation like the GOG version.
Uninstall the game (properly via Control Panel), download the classic manual installer, install the game again and be absolutely sure to do a custom install and install it outside of Program Files, somewhere like C:\Games\... keep the path short. When it's installed, and *before* you run the game, open Windows Explorer to the installation folder and run 'config.exe' to make sure your ini files are populated properly. Now run the game.
Tweaks, as I said. There's an installation guide somewhere around here with some tips with tweaks and patches.
Where can I find the classic manual installer?