S_OK means success... post your code, perhaps you just have a mistake in how you handle the result.

I don't know what code that is so there's certainly a point in posting it, preferably the shortest one that fails.

The solution is likely in improving the error handling to output a useful error message.

First of all, update your graphics card drivers to the latest version, and then post your GPU and your Windows version here together with the code.

If you're not using the D3D11_CREATE_DEVICE_DEBUG flag when attempting to create the device, use it and see if you get any additional D3D error output in your output window. If you are already using it, try removing it in case you're on Windows 7 with the latest update and using the old DirextX SDK instead of the Windows 8 SDK.

The error messages you posted contain messages about WARP and reference-devices which you probably don't want to be using if your system supports D3D11. It could also be a driver problem.

...as it's happening on all of the different non compiled solutions.

Does that mean that you can download already compiled binaries of the same code that works correctly?

That would increase the likelihood that the problem is with the SDK version or similar.