The low speeds are most likely because your processor is far too slow, and when I get games giving just a black window, it has always been a bad rip of said game, so just rip it again.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
