I’m afraid not just yet. Adding the -d3ddebug caused the initial device creation to fail, it’s probably because you don’t have the directx debug layer installed or enabled.
If you hit the windows key, and type directx in the search box, do you see the “DirectX Control Panel (64-bit)” result? If so, when you open that you should see the “Direct3d 10.x/11” tab where there will be a “Debug Layer” section. If not you could try installing the directx sdk (June 2010) to see if re-running will then get a better log.
A dxdiag output might be helpful here too.
The only other things I can think to try right now are making sure you have the latest drivers from nvidia installed, and windows updates, and perhaps reinstall the directx runtime which you’ll find in the Launcher install directory DirectXRedist/DXSETUP.exe