Having the same problem. Don't think it's an NVIDIA problem. My rig: AMD Phenom II X4 3.2 GHZ, 20 GB RAM, ATI Radeon R9 290 4GB 512 cache, Windows 7 Home premium. I've tried installing directly under the main hard drive directory, running in compatibility mode for XP service pack 2 and 3.
Initially, with a fresh install and just implementing compatibility mode, it worked. Displayed all videos perfectly, no black screen. As soon as I changed the audio from 2D to 3D and tried a custom character, I was welcomed to a black screen in place of the intro movie with just the audio playing. Escape button will skip the movie, but the black screen remains with just a mouse pointer icon. Ctrl+Alt+delete will reveal the game screen, but if I tab back to the game, it's unresponsive, and I end up having to force it to close with the task manager.
Tried implementing unofficial patch 1.71
Did a complete uninstall and fresh install then implemented solutions in another thread on the GOG forums under the topic "Black Screen after Character Creation, can hear audio" created by Deadalus023. Would post link but don't have the permissions required. Hope this helps anyone still having issues.
Post edited February 23, 2015 by PhantomBurger