NVIDIA GTX 970 issue

Apparently my SDL2 game works fine on most computers, but gives only a white screen on a system with Windows 10 x64 (Intel Core i7-4790 CPU @ 3.60 GHZ), 16 GB of memory, and most notably a NVIDIA GTX 970.

Google doesn’t locate any issue so far. Does anyone recognize this and/or can offer a solution please? Thank you!