Ensure you are downloading the correct version (64-bit vs. 32-bit) for your Windows architecture.
If you'd like, I can help you find the specific for one of these players or give you a step-by-step guide on configuring codecs for 4K playback. Which player are you leaning toward? mkv player setup.exe download
VLC remains the most popular choice because it includes almost every codec built-in. Open-source and free. Setup: Small file size, installs in under a minute. Ensure you are downloading the correct version (64-bit vs